The southernmost groves are in the southeast corner of Kumamoto Prefecture on Kyushu.
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A ribosomal DNA study of Acer species in 2006 placed A. nipponicum along with the related A.caudatum near the base of the phylogenetic trees recovered.
Acer saccharinum | Acer saccharum | Acer pseudoplatanus | Acer macrophyllum | Acer Inc. | Acer platanoides | Acer rubrum | Acer palmatum | Acer pictum subsp. mono | Norway Maple (''Acer platanoides'') | Manitoba Maple (''Acer negundo'') | Acer sempervirens | Acer heldreichii | ''Acer griseum | Acer davidii | ''Acer'' |