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Muroto, Kiragawa (first selected as a national important traditional buildings preservation district in Kochi Prefecture), Aki-Nahari: Kochi has two crops a year, and sweet potatoes can be harvested in the summer. It is called early summer moat. There is a common misunderstanding, but summer potatoes and autumn potatoes have a slightly different taste and are different

【商品名（製品名）】
よさこい金時
【種類】
Ipomoea batatas L. Lam.
【卸地, 生産地】
Kochi Prefecture
【名前の由来】
A word that changed the old word “Welcome at night”. Or, it is an abbreviation for Yosakoi-section, a folk song of Kochi prefecture, and Yosakoi festival of the same prefecture. In addition, it seems to refer to Kintoki Sakata from the names of festivals, events, and dances in various places that incorporate the format of the Yosakoi Festival in Kochi Prefecture. Kintoki’s childhood name is KINTARO. He always has a red face, so it seems that he started to compare red things to Kintoki. Yorimitsu-Ko Worshiped as one of the four heavenly kings, did you establish a position to be regarded as a “HUMAN” in the wake of the encounter with Minamoto no Yorimitsu?
【主な特徴】
The new summer sweet potatoes are clearly different from the autumn sweet potatoes. Early summer digging New Kintoki sweet potatoes began to be planted in two crops a year in February, and “crop production using tunnels cultivation (cultivation method in which the cultivation ridges are covered in a tunnel shape with vinyl or polyethylene film or non-woven fabric, etc.) It seems that it may be used as a tunnel. For crops with high plant height, the covering period is about one month, and after that, the cultivation is continued. Although the material cost is low, the open-field tunnel cultivation seems to be susceptible to strong wind damage. When tunneling with a non-breathable film such as agricultural vinyl or polyethylene for the purpose of heat retention, it is the same as greenhouse cultivation in that the crop body is covered with the film, but the internal space is smaller than the greenhouse, so the sun The temperature rises and falls sharply both during and at night. Therefore, temperature control during cultivation, mainly ventilation work, is important, and hem ventilation is performed according to the type and growth stage of the crop, and non-woven fabric is drilled. When the tunnel is covered with a breathable material, the internal temperature rise during the day is small, but ventilation work is almost unnecessary.) Since it has a lot of water, it has the characteristic that the skin is soft and the nutrients are high when turned inside out, and many fans call it “Tosabeni Sweet Potato” and value it. Kochi Prefecture, located in the southern part of Shikoku, has a total area of about 7,105 km2 (18th in Japan), of which forests occupy about 84% (1st in Japan). It is blessed with the Pacific Ocean where the Kuroshio Current is washed to the south, the Shikoku Mountains with mountains to the north, the blue sea and the greenery of the mountains and abundant nature. The average annual temperature is 17.7 ° C, which is warm and warm in winter in the plains, but the cold in winter is severe in the mountains and snow may accumulate. The annual sunshine time is 2,034 hours, which is the highest in the country, and the annual rainfall is 3,213 mm, which is the highest in the country. (2006) In the prefecture, highly profitable facility horticultural agriculture (vegetable, fruit tree, flower house cultivation) that takes advantage of the warm and sunny climatic conditions is developing, and it is one of the best facility horticultural production areas in Japan that everyone knows. It has become. In the plains, early cultivation of paddy rice and institutional horticulture centered on vegetables are flourishing due to the blessings of the sun and rain. On the other hand, in the mountainous areas, characteristic vegetables, fruit trees, tea and beef cattle (Tosa brown cattle) are produced in cool weather conditions, and agriculture that takes advantage of the characteristics of each region is developing. Among horticulture, agricultural products such as japanese ginger, eggplant, shishito green pepper, ginger, gynmight, yuzu, and glorisa boast the largest share in the country, and in addition, cucumbers, peppers, okra, small onions, arels melon, fruit tomatoes, lilies, and bundan. Etc. are horticultural items that represent the prefecture. The above major agricultural products such as vegetables and fruits are mainly collected by the Kochi Prefectural Horticultural Agricultural Cooperative Association and shipped and sold to large consumption areas such as Tokyo and Osaka. We have established a brand as a production center for vegetables and fruits. In addition, as mentioned earlier, in recent years, an increasing number of farmers are engaged in environmentally friendly agriculture, such as pesticide-reducing cultivation and organic cultivation using insects, which are natural enemies of pests. The origin of sweet potatoes is presumed to be tropical America, centered on Mexico. It seems that there are various wild plants of the morning glories family to which sweet potatoes belong in this area, but Japanese researchers have conducted research based on morphology, genetic properties, number of chromosomes, etc., and Trifida (Ipomea trifida G. Don) It has been clarified that the plant species. Is an ancestral species. This is a perennial herb that forms lump roots underground and propagates vegetatively. The vine grows, and many cover the surface of the earth. It blooms well in the tropics, and the morning glory-like hard seeds are borne in the scabbard. He prefers warm, well-drained soil. Ipomea trifida G. Don. Has mutated and crossed with other wild species over a long period of time to produce many mutations, and it was artificially selected from among them to give birth to the present sweet potato. It is speculated. And now, sweet potato cultivation has spread all over the world, extending from most of the tropics and subtropics to temperate regions. It is believed that there are several types of sweet potato transmission routes, but it is said that they were already transmitted from South America to Polynesia by sea around 1000 BC. According to records, it was transmitted to India, then to Malay, Indonesia, and the Philippines in the 16th century, and to Fujian Province in China in 1584. It is said that Japan first entered Miyakojima in 1597. Ryukyu began to be cultivated in 1605 from Fukuken, and after 1609 it was transmitted to Satsuma under the control of Satsuma, and it is said that it was cultivated mainly in the Kyushu region. Due to the repeated famines from the beginning to the middle of the Edo period, it attracted attention as a famine crop and spread widely throughout the country, mainly in the warm southwestern regions. An old book called “Banshoko: Published in 1735（Describes the cultivation method and storage method of sweet potatoes as a salvage crop.）” records the cultivation method that Konyo-Ko introduced to the Kanto region in the middle of the Edo period. At first, I don’t know how to do it, so it seems that the potatoes were cut and planted like yams. However, with this method of production, there was a lot of rot and there was a shortage of plants, and the yield did not increase, so it seems that the seedlings were transplanted and cultivated as they are today. In the latter half of the Edo period, it seems that seedlings had already been cultivated in the nursery, and fertilization ridges, seedling collection, seedling cutting, and storage were being carried out. Japanese sweet potato cultivation first place monument : It takes 7 minutes by car from Nishinoomote city area in Kagoshima prefecture to Nakatane on Route 58. It is erected on the left side of the Shimonishi farm road entrance on the Ishidera coast. In the cultivation of sweet potatoes, Konyo-Ko was famous for succeeding in cultivating sweet potatoes at the behest of Yoshimune Tokugawa and spreading nationwide, but before he succeeded, sweet potatoes were cultivated early on Tanegashima. The person who succeeded in cultivating the sweet potato is Kyuzaemon Ose at Shimoishidera, Nishinoomote City (famous for Karaimo Shrine). The 19th island owner, Hisamoto Tanegashima (Seirin), obtained sweet potatoes from King Ryukyu in 1698. He ordered his vassals to study the cultivation method, and the vassals had Kyuzemon of Shimoishiji make a prototype, and while trial and error continued, he finally succeeded in cultivation. Then, Koya, who was said to be a potato god, was born in 1698, spreading to the Satsuma domain and succeeding in cultivation in Yamakawa seven years later. Seirin Shrine thanked the 19th generation Shimashu Hisamoto (issued by Seirin) for the great achievement of sweet potato cultivation by Matsujuin (23rd generation islands leader Hisamichi) in 1863, and passed on the achievements to posterity. Seirin Shrine was built at the shooting site of Hongenji Temple (currently under the city hall, at the branch office chief’s office). After that, it was relocated to the plateau of the worship tower under the present Hongenji Temple and continues to the present day. The view is good and there are many worshipers here. By the way, Hisamoto devoted himself to feudal affairs and island affairs as the name of the feudal lord and father even before he became the head of state of Estonia and the island lord. He was the owner of reputation island chief, who was better than his father. He also invited sweet potato cultivation for the first time when he actively promoted the promotion of industry. In other words, when I investigated the situation in Ryukyu, I learned that sweet potatoes are easy to cultivate and have a lot of harvest, and that they are delicious. Succeeded in planting this at Kyuzaemon in Shimoishidera, Nishinoomote City. In 1705, seven years later than this, Riemon Maeda also obtained sweet potatoes from Ryukyu and reported them to his hometown mountain river. Immediately after that, the number of disasters in Kyoho was less than others. As a result, I did not forget to thank Seirin Shrine, which enshrines Kuki, and sweet potatoes in front of the graves of Kyuzaemon at the time of harvest. Therefore, Japan’s first sweet potato cultivation was carried out at Shimoishidera, Nishinoomote City, Tanegashima. In front of the monument, there is a guide board so that you can see the graveyard of Kyuzaemon. Cemetery of Kyuzaemon Ose: Shimoishidera, Shimonihi, Nishinoomote City, Kagoshima Prefecture. In front of the grave, there is a graveyard of Kyuzaemon, which is a little before the Shimoishiji public hall, which is 180 m east of the “Japanese sweet potato cultivation first place monument” along National Highway No. 58. In front of the graveyard, there is a guide panel with detailed explanations about sweet potato cultivation. The graveyard was built to commemorate the 30th anniversary of Nishinoomote City, and it is said that Mr. and Mrs. Kyuzaemon are enshrined in the graveyard. And the large potatoes harvested that year are offered in front of the grave. In addition, every year in Nishinoomote City, the event business of “Sweet Potato Festa” is held in November. Before the “Sweet Potato Festa,” the Ose family, who are descendants, are presenting the potatoes harvested that year to Mayor Nishinoomote. It seems that Tanegashima still treats sweet potato (Ipomoea batatas) as an important agricultural product. Tanegashima is famous for the introduction of guns and the Tanegashima Space Center, but as mentioned earlier, it is also the place where sweet potatoes were first cultivated in Japan. Naruto Kintoki is famous for Kintoki sweet potatoes, but Naruto Kintoki is also a brand limited to the production area of “Kokei No. 14 sweet potatoes” born in Kochi. This product is the same high-grade No. 14 variety as Naruto Kintoki sweet potato, and is called by various brand names in Kochi, such as Nishiyama Kintoki sweet potato, “Yosakoi Kintoki sweet potato”, and Tosa Kintoki sweet potato, depending on the production area. The finest is said to be sweet-tasting old potatoes that have been aged by laying them clean, but new potatoes are inferior in sweetness, but because of the deliciousness of the skin and the low sugar content, they are hard to burn, so they are baked and fried (Daigaku-imo). It is very suitable for sweet potato kenpi, fried food, grilled iron plate, etc.). Basically, sweet potatoes become sweet when left to stand for 1-2 months. It seems that the new potatoes are laid down a little at the time of shipment, but for perfection, if they are laid down in a cool and well-ventilated place, the moisture tends to fly off and the sweet potatoes tend to become sweeter. “Transition of sweet potato breeding test site” : The sweet potato breeding business was significantly modified in 1937, and a seedling selection business for sweet potatoes was added to the Kyushu Wheat Test Site of the Agricultural Experiment Station. Is said to have been installed. The purpose of the munitions was to fly the Zero Fighter with bioethanol produced from sweet potatoes. That year, Masatoshi Onoda, who was transferred from the Wheat Designated Test Site (Chiba), was appointed as the first chief of Chiba. This test site became the Agricultural Improvement Laboratory in 1947, the Agricultural Experiment Station in 1951, and the Agricultural Research Center Sweet Breeding Laboratory (currently the Institute of Crop Science Edible Sweet potato Team), the first generation. The laboratory manager will be Mr. Masatoshi Onoda (resident 1937-67). During his 30-year tenure from 1937 to 1967, Masatoshi Onoda was No. 1, 4, 5, 6, 8, and 10, Kuroshirazu (N11), Chihaya (N12), Shirosengan (N13), Okimasari (N14), and Kurimasari (N14). It is said that 13 varieties of（N21）, Tamayutaka (N22), and Konasengan (N27) were cultivated. The last 30 years were the Sino-Japanese War and the subsequent Pacific War. Mr. Onoda is a lieutenant in the Army Railroad Regiment at the time of drafting. Although he was retired, there remains a question as to whether Onoda, who was 31-39 years old at the time, had not been convened or set sail. Regarding this, Takemata, a former subordinate, heard from him (former Professor Isao Tarumoto of Osaka Prefecture University Graduate School: he was assigned to a test site in Tsukuba City, Ibaraki Prefecture (1986-92)). However, after receiving an application from the Chiba Prefectural Office that it was “difficult to replace other people,” he was exempted from military service after joining the army for one day. His ex-subordinates have commented that his serious and strict temperament, which is all about breeding, is related not only to his birth in Kokura, Kyushu (1900), but also to his career exempted from military service. He is 94 years old (born 1906 to died 2000).

This specially made sweet potato is characterized by a bright red color and a slightly sweet scent peculiar to potatoes. It is a discerning gem that was brought up by looking at. Ecosystem cultivation derived from Tosa refers to a method of growing vegetables by reducing the burden on the environment as much as possible without relying on chemically synthesized pesticides as much as possible. It seems that pest control includes predation using insects, which are natural enemies, creating an environment where insects cannot see, and suppressing the outbreak of pests by putting an ultraviolet cut film on them. It seems that the cultivation method recommended by the government is called “specially cultivated agricultural products” and “ecosystem cultivation” is called “eco-vegetables”. This excellent sweet potato is cultivated in a greenhouse, covered tunnel (early cultivation), taking advantage of the warm climate of Kochi prefecture. The original variety is said to be “High-class No. 14 sweet potato”. It is famous as a sweet potato produced in Kochi prefecture that is suitable for early digging. In 1935 at the Okinawa Prefectural Agricultural Experiment Station, a hybrid seed of “Nancy Hall sweet potato” and “Siamese sweet potato” “High-class No. 14 sweet potato” (medium sprouting, slightly inferior in sprouting number and seedling elongation. The size is medium, the skin is crimson, the meat is yellowish white powder, and the taste is excellent and the appearance is good.) “sweet potato”. A variety that has been cultivated for quick digging. Since it is not stored at all, it’s shipped as “fresh potatoes” freshly dug. The shipping time is from the end of May to the end of July, which is earlier than other potatoes. , Tendency to hit the market. Since the skin is very thin and the washing and sorting by machine is limited, each one is carefully hand-washed and hand-sorted. Because it is of high quality, it sells a lot. Jalapin, a white liquid nutrient that comes out of the cut end of “sweet potato”, can be expected to have the effect of promoting intestinal peristalsis and softening stool (laxative action). It is said that the synergistic effect of dietary fiber and yarapin peculiar to sweet potato is large.

This excellent sweet potato is prematurely hypertrophied and can be harvested about 100 days after planting, so it seems that tunnel mulch can be used for all cropping types. In addition, it has a relatively high fertilizer resistance, so it is an excellent product that can be cultivated on the site of vegetables. However, it seems that the longer the field stay, the more secondary enlargement progresses and the deeper the grooves become, and the commercial value for fruits and vegetables declines. The shape of sweet potatoes also changes depending on the cultivation conditions, and it seems that they become long in mulch cultivation and tend to be short spindle-shaped (round) when the cultivated soil is shallow or under dry conditions. Since it has good storability, I heard that major production areas have a planned shipping system from early shipment by early digging to curing storage and shipment.

Taking advantage of the warm climate of Kochi, it is a sweet potato that is cultivated in the open field by tunnel covering as well as green house cultivation, which helps in times of need. While general sweet potatoes are shipped from August to November, Tosabeni sweet potatoes are shipped from late May to mid-July, the earliest in Japan. As the name suggests, this variety is characterized by a bright crimson color and a very thin skin, which further enhances appetite. Therefore, it cannot be cleaned and sorted by machine, and each work is done manually. It seems that it is shipped nationwide as a freshly dug new sweet potato without storing it at all. Unlike other stored potatoes, consumers are very interested in it because they can taste the whole skin.

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