JPX Market Innovation & Research, Inc. (JPXI) is pleased to announce that, as of June 29, 2026, we will begin providing the 10-level Order Book Historical Data Set (hereinafter referred to as “Dataset”), which is derived from market data messages (hereinafter referred to as “FLEX Messages”) provided by Tokyo Stock Exchange and processed to facilitate the reconstruction of order books. JPXI provides "FLEX Historical," a historical database compiled from daily FLEX Message records. FLEX Historical