Japanese badge ID, please

[kaguyahime]

Dear Sirs!

Please, have a look at this nice badge. No kanji. Size appr. 15x15 mm. What it about? May be some connection to Nakajima Factory? Thank you for your attention.

[JapanX]

Looks like private railway company emblem.

 

https://commons.wikimedia.org/wiki/Category:Logos_of_rail_transport_companies_of_Japan

[kaguyahime]

Thank you ever so much!