BOJ ETF purchases to track Japan stock market indexes

The Bank of Japan have outlined how their ETF purchase program is to be split
– 75% of ETF purchases are to be used for ETFs tracking the Topix Index
– other 25% to be used for ETFS tracking Topix, Nikkei 225 & JPX-Nikkei 400
With the BOJ buying heavily leaning in favour of the Topix over the