At one time various kinds of efforts were made for preserving freshness or preventing contamination and so on, but now they are not noticed because of convenient devices for keeping foods such as refrigerators or technical developments of transportation, a part of which remains in the cooking or seasoning technique called zuke (tuna preserved with soy sauce).
現代では冷蔵庫など食品の保存に便利な装置や輸送面での技術的進歩によりあまり意識されない所ではあるが、かつては食材の鮮度保持や雑菌繁殖予防などで様々な工夫が行われ、その一部は今日ヅケと呼ばれる調理や味付けの技法に生き残っている。