Japanese clethra; tree clethra; Clethra barbinervis
A deciduous tree native to Japan, known for its panicles of white flowers in summer and its use in gardens.
I planted a Japanese clethra in the garden.
When the clethra blooms, it gives off a nice fragrance.
The name 令法 (りょうぶ) is of uncertain origin; it is a specific plant name with no clear etymological breakdown.