FinanceZentoshin's debt hit $710m, making it Japan's largest bankruptcy filing this yearZentoshin's services were popular with businesses in Osaka's Minami nightlife district. (Nikkei montage/Photos by Toshiki Sasazu and Arisa Moriyama)MAMORU TSUGE and RYOHEI SHIMIZUJuly 9, 2026 04:07 JSTOSAKA/TOKYO -- The sudden bankruptcy of Japanese credit card payment processor Zentoshin has left many restaurants waiting for reimbursements that may never come, triggering concerns about a chain reaction of bankruptcies among small and medium-sized businesses.