In a quarterly report, the central bank raised its economic assessment for four of the country's nine regions. It maintained its assessment for the remaining five.

"Many regions saw their economies pick up, or pick up moderately," with Japan's re-opening of borders drawing in more overseas tourists and boosting services demand, the report said.

Some firms appeared to struggle increasing pay as rising fuel and raw material costs squeezed profits, the report said.

"But there were many cases where companies were increasing winter bonus payments, or plan to hike wages" to cope with a tight labour market and compensate employees for the rising cost of living, it said.

(Reporting by Leika Kihara; Editing by Jacqueline Wong and Gerry Doyle)

By Leika Kihara