Spiraea japonica or shimotsuke are in season. They are native to Japan, see photos of these blooming on Mt Ibuki.
Japanese spiraea is one of more than eighty species of spiraea found in the temperate region of the northern hemisphere. Most of the species have been introduced into cultivation and are popular garden shrubs planted for their decorative flowers. It belongs to the Rosaceae (Rose) family.
|Height: Japanese spiraea is a small shrub with slender erect stems to 2 m (6.5 ft) tall.
Stem: Brown to reddish-brown stems are round and glabrous to densely pubescent on branchlets. Buds are very small, rounded to triangular and somewhat flattened.
Leaves: The leaves are alternate, lanceolate to lance-ovate, simply or doubly serrate, acute at base, 8-12 cm (3.0-4.5 in) long, 3-4 cm (1.2-1.6 in) wide, and glabrous.