1939 (Showa 14), Li Yuedian and his wife began to sell sweet potato cakes (the predecessor of rice bags on the pond) on the platform.
1948 started to make "Yu bento" and sold it on the platform in the pool. The price is 1.5 yuan (the first generation of rice bags).
1962, packed in wooden cases and supplied with water and electricity for the pool (second generation rice bag).
1976, the color of steamed buns on the pond changed (the third generation steamed buns).
1988, a fire broke out at the original site of the Mibao store in Chishang.
1990, Chishang Mibao Store moved to its present address: No.259, Zhongxiao Road, Chishang Township, Taitung County.
1995 16 on may 6th, the first rice bag shop in Wu Tao was established.
On June 25th, 2000, 10, the old store merged with Ikebukuro was officially renamed as "Wu Tao Ikebukuro", and a franchise chain (fourth generation steamed stuffed bun) was opened.
On March 10, 2002, rice bags on the pond in Wu Tao were selected as one of the top ten commodities of the year.
On June 9, 2002, Ikebukuro Museum was established.