The area is the gateway to Inner Nikko (奥日光 Oku-Nikko). Buses from Tobu Nikko Station cost ¥1100. Buses from the shrine & temple area cost ¥950 (look for bus stop #9 on Hwy 120 just outside Nishi sando -- note that this bus stop system is separate from the bus line that circles the shrines and temples). The bus ride is about 30 minutes from Nikko -- get off at bus stop #24. Pasmo cards are accepted.
entrance fee: 520 yen to the observatory