TOKYO — The Bank of Japan's (BOJ) unexpected decision to introduce negative interest rates in January 2016 faced strong internal opposition, according to policy meeting minutes released on July 15, 2026.

The move, approved narrowly by a 5-4 vote, came after extensive asset purchases failed to stimulate inflation. The BOJ cut its benchmark interest rate below zero aiming to boost growth and counteract sharp yen appreciation that was harming Japan's export-driven economy.

The decision surprised markets, especially as then-BOJ Governor Haruhiko Kuroda had recently dismissed negative rates as an option in parliament. Following the announcement, global equities rose, the yen weakened, and sovereign bonds rallied, mirroring aggressive policies pioneered by the European Central Bank (ECB).

However, dissenting board members expressed serious reservations. Sayuri Shirai criticized the proposal as "half-baked and prepared in a hurry," arguing the economic conditions did not warrant such a major step. Takehiro Sato warned the policy risked dragging Japan into a competitive rate-cutting cycle with the ECB to devalue currencies, stating, "It's wise to avoid falling into such a futile game," and highlighting potential strain on Japan's banking system. Koji Ishida, a commercial banker turned board member, doubted that pushing already low rates lower would significantly increase lending or capital expenditure.

The minutes also revealed concerns about charging a 0.1 percent interest on a portion of financial institutions' deposits at the BOJ, a key element of the negative rate policy.

The BOJ typically releases summarized minutes weeks after meetings, with full accounts published about a decade later. These revelations underscore the challenges Kuroda faced in expanding monetary policy tools amid economic headwinds.

Sources