The world's biggest pension fund, nearing the end of a plan to shift its asset mix and bulk up on equities, need not rush itself to reach new allocation targets, according to its president.

The ¥135 trillion Government Pension Investment Fund should be flexible in how it shifts to stocks from bonds, President Takahiro Mitani said.

Selling quickly just to reach goals set last year would be wrong, as the fund must also weigh market conditions and the pace of bond redemptions, the 66-year-old said.