📝 Résumé exécutif
The Japanese yen initially rallied against the dollar after the Bank of Japan lifted its key rate to 1%, but quickly erased those gains as investors judged the move as largely priced in and the forward guidance as too cautious. The USD/JPY pair settled little changed, failing to break below recent support despite the rate hike. The tepid reaction highlights market skepticism about sustained yen strength and the BOJ's limited room for aggressive tightening.