Daily Crypto News Roundup: September 29

Bitcoin Japan has completed its first purchase of approximately 12 BTC for 157 million yen. Citigroup is expanding tokenized deposit transfer services to Japan and the UAE and deepening its partnership with Coinbase for stablecoin settlements. The yen-pegged stablecoin JPYC has listed on HTX. Other developments include the South Korean Financial Services Commission considering a market-making framework for crypto, Hong Kong's SFC expanding regulatory cooperation with the AFRC, and Tether reporting the freezing of approximately $550 million in USDT linked to Iran sanctions. Additionally, Anthropic has released Claude Sonnet 5.5 with improved generation speeds.