Question: Are Stachyurus and Corylopsis both native to eastern Asia?

Context articles: Paeonia lactiflora
Cambaroides
Osmunda claytoniana
Dryopteris
Stachyurus
Corylopsis
Yellow-rumped flycatcher
Lygodium japonicum
Hydrangea
Celtis

Paeonia lactiflora (Chinese peony or common garden peony) is a species of herbaceous perennial flowering plant in the family Paeoniaceae, native to central and eastern Asia from eastern Tibet across northern China to eastern Siberia.
Cambaroides is a genus of freshwater crayfish from eastern Asia (eastern Russia, northeastern China, Korean Peninsula and Japan).
 Together with "Astacus", they are the only crayfish native to Asia.
 "Cambaroides" contains seven species:
Osmunda claytoniana, the interrupted fern, is a fern native to Eastern Asia and eastern North America, in the Eastern United States and Eastern Canada.
Dryopteris , commonly called wood fern, male fern (referring in particular to "Dryopteris filix-mas"), or buckler fern, is a genus of about 250 species of ferns with distribution in Eastern Asia, the Americas, Europe, Africa, and the Pacific islands, with the highest species diversity in eastern Asia.
 Many of the species have stout, slowly creeping rootstocks that form a crown, with a vase-like ring of fronds.
 The sori are round, with a peltate indusium.
 The stipes have prominent scales.
Stachyurus is the only genus in the flowering plant family Stachyuraceae, native to the Himalayas and eastern Asia.
 They are deciduous shrubs or small trees with pendent racemes of 4-petalled flowers which appear on the bare branches before the leaves.
 The plants have leaves with serrate margins.
 Stachyuraceae contains a single genus with eight species.
Corylopsis is a genus of nearly 30 species of shrubs in the witch hazel family, Hamamelidaceae, native to eastern Asia with the majority of species endemic in China but with some also in Japan, Korea, and the Himalayas.
 This genus is also known from the extinct species "Corylopsis reedae" described from Eocene leaf fossils found in Washington State, USA.
The yellow-rumped flycatcher, Korean flycatcher or tricolor flycatcher ("Ficedula zanthopygia") is a species of flycatcher found in eastern Asia.
 A distinctive species with almost no look-alike other than the narcissus flycatcher.
 It breeds in eastern Asia including parts of Mongolia, Transbaikal, southern China, Korea and western Japan.
 They winter in parts of the Malay Peninsula and South Asia.
Lygodium japonicum is a species of fern that is known by the common names vine-like fern and Japanese climbing fern.
 It is native to eastern Asia, including Japan, Korea, southeastern Asia, and India, and eastern Australia.
 The fern is present in the southeastern United States and Puerto Rico as an introduced species.
Hydrangea ( ; common names hydrangea or hortensia) is a genus of 70–75 species of flowering plants native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas.
 By far the greatest species diversity is in eastern Asia, notably China, Japan, and Korea.
 Most are shrubs 1 to 3 meters tall, but some are small trees, and others lianas reaching up to 30 m by climbing up trees.
 They can be either deciduous or evergreen, though the widely cultivated temperate species are all deciduous.
Celtis, commonly known as hackberries or nettle trees, is a genus of about 60–70 species of deciduous trees widespread in warm temperate regions of the Northern Hemisphere, in southern Europe, southern and eastern Asia, and southern and central North America, south to central Africa, and northern and central South America.
 The genus is present in the fossil record at least since the Miocene of Europe, and Paleocene of North America and eastern Asia.