Japan M&A boom momentum is prompting Citigroup to expand its investment banking team in the country by 30% by the first half of 2026, aiming to capture deal activity involving Japanese companies that has reached about USD350bn this year, the highest since records began in 1998. Japan vice-chair Masuo Fukuda said governance reforms have made corporate boards more shareholder-focused, driving divestments of non-core assets and overseas expansion, while hostile bids, private equ