Etymology and distribution of 長坂.

Nagasaka 【長坂】^{レベル5
About 18,000}  The Japanese surnames etymology dictionary.

Niigata-ken , Gunma-ken , Saga-ken .

① Yamagata-ken Tsuruoka-shi Origin of flat (Hirakata). A place name with a record since the Edo period. The place name was written as "squares", "Hiratoga" and was called "Hiraga" from 1596 to 1615 (Keicho year). Niigata-ken Murakami-shi Tradition with rocks. Ibaraki-ken Shimotsuma-shi Square birthplace.

② 平形 irregular shape. Gunma-ken Shibukawa-shi In Onoko tells me that it was renamed from the flat family name at Meiji New surname.

③ Saga-ken Saga-shi The inside of the castle was in the Edo period in the Saga clan of the clan office.