Japan joined the World Bank Group on August 13, 1952, and since then it has strengthened its status as a creditor in the 1970s. Japan became one of the largest shareholders.
The Executive Director represents Japan in the Executive Boards of the World Bank Group. Jointly with the other 24 Executive Directors, they oversee and govern the business of the World Bank Group. The Executive Director is supported by his advisory and administrative staff who are committed to working with the 189 member countries to present a consensus on development issues.
The Executive Director is a member of the Committee on Development Effectiveness (CODE) (pdf) and the Committee on Governance and Executive Directors' Governance Matters (pdf).
See also WBG country website for Japan.