According to @CoinMarketCap, Japan's Financial Services Agency intends to reduce the crypto tax from a top marginal rate of 55% to a flat 20%, introduce insider trading rules, and require mandatory disclosures for 105 cryptocurrencies, including Bitcoin (BTC) and Ethereum (ETH) (source: @CoinMarketCap on X, Nov 17, 2025). For Japanese traders previously facing the 55% bracket, net after-tax retention on gains would rise from 45% to 80%, a 35 percentage point improvement that can materially change position sizing and risk-reward thresholds (source: @CoinMarketCap on X, Nov 17, 2025). The new insider trading rules and expanded disclosures signal tighter oversight across a defined set of 105 assets, a factor that can influence listing standards, reporting cadence, and liquidity segmentation for BTC, ETH, and covered altcoins (source: @CoinMarketCap on X, Nov 17, 2025). Traders should monitor the official FSA rollout details and timing to calibrate exposure around Japan hours when policy headlines can impact price discovery and spreads (source: @CoinMarketCap on X, Nov 17, 2025).