Why are Japanese restaurants leaving the Chinese market in droves?

Recently, Yoshinoya, a well-known Japanese catering company, announced that Hanamaru Udon restaurant is leaving the Chinese market. Hanamaru Catering Management (Shanghai) Company, Shanghai-based Hanamaru Udon operating subsidiary, will be liquidated in 2022. Moreover, other Japanese company catering brands are also reducing their dependence on the Chinese market, closing stores one after another.