When the Sino-Japanese war became intensified, the amount of whale meat to be brought back to Japan was increased due to the request of increasing the amount of food available, and a large-scaled refrigerator ship was introduced for the first time in Japan.
日中戦争が激化すると食糧増産の要請から鯨肉の持ち帰り制限が緩和され、日本最初の大型冷凍船も導入されるなどした。