Purple flowers that grow on trees. Not wisteria, not crape myrtle, not bauhinia, not phoenix tree ... what is this?

This picture shows osmanthus fragrans, which grows leaves first and then blooms, usually in July and August. Wisteria grows on vines. The color is not purplish red, but purplish blue. Flowers are strung, similar in shape to Sophora japonica, and generally bloom in late March and early April. Bauhinia also blooms on trees, and its color is purplish red, but it blooms first and then grows leaves. Moreover, the pedicel is short and there are few tender lateral branches. Flowers are like dense piles on the trunk, and usually bloom in April.