Hayato Ikeda
In 1954, the economic system MITI had cultivated from 1949 to 1953 came into full effect. Prime Minister Hayato Ikeda, who Johnson calls "the single most important individual architect of the Japanese economic miracle," pursued a policy of heavy industrialization. This policy led to the emergence of 'over-loaning' (a practice that continues today) in which the Bank of Japan issues loans to city banks who in turn issue loans to industrial conglomerates. Since there was a shortage of capital in Japan at the time, industrial conglomerates borrowed beyond their capacity to repay, often beyond their net worth, causing city banks in turn to over-borrow from the Bank of Japan. This gave the national Bank of Japan complete control over dependent local banks.