TOKYO— SoftBank smashed profit records in its home country, riding a series of blockbuster initial public offerings to an annual net income of ¥4.99trn, equivalent to $45.9bn — the highest ever for any Japanese company.

The results, which include a record profit of ¥1.93trn for the quarter that ended in March, cap a wild year in which the Japanese technology investor rode roller-coaster stock markets from the lows at the beginning of the pandemic to recent highs.