MSCI Barra Japan Equity Model (JPE4) is a multi-factor equity risk model designed for institutional investors managing Japanese equity portfolios across daily, short-, and long-horizon investment strategies. The model provides daily updates for style, industry, and market risk factors and incorporates systematic equity strategy factors including momentum, value, sentiment, liquidity, earnings quality, and reversal factors to support portfolio construction, risk decomposition, stress testing, and quantitative portfolio management.