... Relationship Banking Matter? The Myth of the Japanese Main Bank Yoshiro Miwa and J. Mark Ramseyer* The Japanese main bank system” figures prominently in the recent litera-ture on relationship banking, ” ... from the main bank than from the other banks. Because they also deal regularly with the other banks (the mean firm borrowed only 29 to 33 percent of its bank debtfrom its main bank) , however, they ... percent of the others). Of the firms that290 Does Relationship Banking Matter? switched main banks in 1986–1990, 58 percent switched again in 1990–1994(and 20 percent of the others).As in the previous...