日本怎样让食物保存得更久？

Nara National Research Institute for Cultural Properties, Mokkanko database, record 6AACHU27000031, shipping label from the eastern government-office sector of the Heijō Palace inner residence area, dated to the tenth lunar month of Tenpyō 1 (729). The catalogue identifies Yatabe no Nemaro (矢田部祢麻呂) and a bonito contribution under the chō levy. The calendar month is not converted into a Gregorian month, and no precise transport duration is inferred. https://mokkanko.nabunken.go.jp/ja/6AACHU27000031 ; https://doi.org/10.24484/mokkanko.6AACHU27000031

Nara National Research Institute for Cultural Properties, ColBase description of the related prepared-bonito label, surfaced through Japan Search, item cobas-166056. Its explanatory comparison with namaribushi is used to distinguish the early product from later hard, mold-treated bonito; it does not establish a complete ancient recipe or tested shelf life. https://jpsearch.go.jp/item/cobas-166056

Ministry of Agriculture, Forestry and Fisheries, “Nara-zuke,” Traditional Foods in Japan, sections “Product overview,” “History and culture,” and “Production method.” The history distinguishes early references to kasuzuke, medieval changes in sake production, and later forms of repeated pickling. The essay does not equate an ancient written name with the complete modern manufacturing sequence. https://www.maff.go.jp/e/policies/market/dento_syoku/menu/nara_zuke.html

Akano Hirofumi (赤野裕文), “寿司の変遷と酢の力,” Journal for the Integrated Study of Dietary Habits 31, no. 4 (2021): 201–206, published abstract, on fully and partially fermented sushi, quick sushi, and vinegar's role. This is a historical and food-science review; the abstract, not unexamined experimental results or detailed pages, supports the limited sequence used here. https://doi.org/10.2740/jisdh.31.4_201 ; https://www.jstage.jst.go.jp/article/jisdh/31/4/31_201/_article/-char/ja/

Ministry of Agriculture, Forestry and Fisheries, “馴れずし（なれずし）,” Mie Prefecture entry in にっぽん伝統食図鑑, sections “食品概要” and “歴史・文化、関連行事.” Used for the Muromachi-period development of rice-eating namanare and the existence of different regional forms. The page's proposed ultimate Southeast Asian origin is not treated as independently established here. No preparation described in the essay is a home food-safety instruction. https://www.maff.go.jp/j/keikaku/syokubunka/traditional-foods/menu/narezusi.html

Agency for Cultural Affairs, “土佐節の製造技術,” Cultural Heritage Database, record 547208, historical and technical description. The late-early-modern origin is expressly qualified in the source. The process is described at the level of the recognized transmitted technique, without projecting every present-day operation unchanged into its beginnings. https://online.bunka.go.jp/db/heritages/detail/547208

Oginome Nozomu (荻野目望), “江戸の食を彩る『かつお節だし』,” Food Culture, no. 36 (2026), Kikkoman Institute for International Food Culture, section 2, “カツオから、かつお本枯節ができるまで.” The author is a specialist associated with bonito processing. Selected technical prose is used to explain repeated handling and moisture assessment, not as an eighteenth-century workshop record or a reconstruction from the article's unexamined diagrams. https://www.kikkoman.com/jp/kiifc/publication/foodculture/no36_katsuo.html

Kidoguchi Michiaki (木戸口道彰), “開拓使石狩缶詰所,” Ishikari File 0125-01, 10 October 2011, Ishikari City Museum historical series. The account identifies the 1877 opening, compound facilities, manual equipment, staff and instruction, export orientation, and the April 1878 report listing both canned products and smoked salmon. It is a museum historical account drawing on local histories, not an independently examined factory ledger. https://www.city.ishikari.hokkaido.jp/museum/1001801/1004573/1004698.html

Japan Canners Association, “缶詰のあゆみ,” opening explanation of the combination of a sealed container and heat treatment, with its historical account of Japanese canning. Used only for that general preservation principle; the essay does not reproduce processing instructions, universal shelf-life claims, or the page's broader national culinary generalizations. https://www.jca-can.or.jp/useful/about

Hakodate City Museum, “大日本物産図絵函館氷輸出の図,” catalogue record 500348, historical explanation of Nakagawa Kahei's business, Goryōkaku moat water, 1871 expansion, and sales to Kantō and Kansai. The catalogue text, not a new visual analysis of the print, supplies these facts. The print's own publication date is not used to date the entire trade. https://hakohaku-archives.c.fun.ac.jp/records/500348

Nichirei, ニチレイ75年史, part 1, chapter 1, section “文明開化と天然氷,” printed p. 4 (digital page 30), subsection “開港と『ボストン氷』の輸入.” The historical account identifies drinks and meat preservation among foreign-settlement uses of imported ice. Its modern-price comparisons and broader claims about the origins of the international ice trade are not used. https://www.nichirei.co.jp/75thhistory/pageindices/index30.html