A full account released about 10 years later showed the 5-4 decision faced warnings over banking strain, rushed preparation and a potential currency war with the ECB.
The Bank of Japan's 2016 decision to introduce negative interest rates faced unusually sharp internal opposition, with board members describing the plan as rushed, doubtful and potentially destabilising, according to a full account of the meeting released about 10 years later. The measure passed by a 5-4 vote in January 2016 after large-scale asset purchases failed to lift inflation, as Haruhiko Kuroda pushed to cut a benchmark rate below zero to support growth and counter yen strength. Dissenters warned that charging 0.1% on part of financial institutions' deposits at the BOJ could hurt the banking system, do little to stimulate lending or capital expenditure, and risk drawing Japan into competitive rate cuts with the European Central Bank (ECB, euro zone central bank). The minutes also suggested many board members were not closely involved as the plan was prepared. The move stunned markets because it came days after Kuroda had ruled out negative rates in parliament; global equities rose, the yen fell and sovereign bonds rallied after the decision. The BOJ ended negative rates and other elements of Kuroda's stimulus in 2024, and current chief Kazuo Ueda has also faced divisions on the board as energy shocks linked to the Middle East conflict complicate the outlook and the BOJ's rate-hike path.