This is interesting - getting hits from user agent DoCoMo which is listing itself as a Googlebot:
DoCoMo/2.0 N905i(c100;TB;W24H16) (compatible; Googlebot-Mobile/2.1; +http://www.google.com/bot.html)
I looked it up and is in fact on the Google network:
OrgName: Google Inc.
OrgID: GOGL
Address: 1600 Amphitheatre Parkway
City: Mountain View
StateProv: CA
PostalCode: 94043
Country: US
NetRange: 66.249.64.0 - 66.249.95.255
I looked into this further and apparently Google and Japanese mobile carrier NTT DoCoMo have formed some sort of partnership:
Googe DoCoMo Partnership