Time Out says
On a clear night, you can gaze out across Tokyo and as far as Yokohama. Mt. Takao's beer garden is located 500m above sea level, and does a good job of keeping hikers well sozzled throughout the summer. The price (¥3,800 for men, ¥3,600 for women) includes a buffet of Japanese, Chinese and Western food – none of it exactly what you'd call gourmet fare – and two hours of free-flowing beer, wine and cocktails. To say that this place gets crowded at the weekend would be a gross understatement. The garden is open from mid-June to mid-October, and one word of warning: the last cable car departs at 9.15pm sharp. Reservations are taken for weekdays only.
Mt Takao Beer Mount's opening days for 2018 are from June 15 to October 15.
2205 Takaomachi, Hachioji-shi
|Transport:||Next to Takaosan cable car station|
|Opening hours:||Daily 1pm-9pm, L.O. food & drinks 8.45pm|