Take a taxi at Hon-Atsugi Station (about 20 minutes).
Get off at Aikou-Ishida Station (Odakyu line) and go to the North exit, catch either the "Mori-no-Sato" bus (Ai17) or the "Shoin University" bus (Ai18) at the bus terminal No.4. Get off at the Tsushin Kenkyusho Mae(Electrical Communications Laboratories) bus stop (20 minutes).
Another way is to get off at the East exit of Hon-Atsugi Station and go to the bus center(6 minutes by walk ).
Then catch either the "Mori-no-Sato via Akabane Takamatsuyama" bus (Atsu44) or the "Mori-no-Sato via Funako Mori-no-Sato Aoyama" bus (Atsu45) at the bus terminal No. 9 (25 minutes).
The timetable of a bus is here.
Documents are available only in Japanese.
Take the Tomei expressway and exit at the Atsugi interchange. Take the Odawara-Atsugi Road and exit at the first exit ramp on the left (the Isehara exit). Proceed straight. After passing under the overhead road, turn right at Taya intersection. Proceed about 3 km, crossing Route 246 and passing through Aiko-bashi and Akasaka; turn left at the Kagosekibashi-Kitagawa intersection. Go straight about 1.3 km and turn right at the Onobashi intersection. Turn right at the next intersection (Wakamiyabashi). Proceed up the hill; you will see the NTT Atsugi R&D Center on the right.