Air SIM for Japan
You can get Cell ID and Location Area Code by issuing "AT+CGREG?" AT command as a part of NTT Docomo network functionality.
AT+CGREG? +CGREG: 0, 1, "0021", "0404404F", 4
In above case "0021" is the Location Area Code and decimal converted value of "0404404F" is the Cell ID.
If you combine these information with SIM MCC and MNC along with Google Maps Geolocation API, you can acquire approximate device location. For Air SIM for Japan, MCC is 440 and MNC is 10.
Air SIM for Global
For global Air SIM, this depend on local roaming carrier's network functionality so please try on your own and test it.
In any situation, AT command set will depend on the device. Please inquire device manufacturer for AT command support on specific devices.