FTSE Russell, a London Stock Exchange Group (LSEG) subsidiary, announced on August 22 that Metaplanet has moved from the small-cap category to mid-cap. The company will join the FTSE Japan Index from September 22, a step that may raise its profile and attract institutional investment. FTSE Japan Entry Expands Global Reach The FTSE Japan Index measures the performance of large- and mid-cap Japanese companies through a market capitalization-weighted system. Global asset managers, including Vanguard, use the index as a benchmark for ETFs
source: https://beincrypto.com/metaplanet-upgraded-to-mid-cap-joins-ftse-japan-index/