Aratani

Aratani is a Japanese surname. It is not particularly common but can be found throughout Japan, with a slightly higher concentration in certain regions. The name is often written with the kanji characters 新谷, meaning "new valley." Other kanji combinations are possible, though less frequent.

The origin of the name likely stems from a topographical descriptor, referring to a family that lived near or in a newly formed valley. As with many Japanese surnames, the meaning and prevalence can vary slightly depending on the specific region and family lineage. The surname is also found among individuals of Japanese descent living outside of Japan.