Please take Hakone tozan bus (bound for Tougendai : 桃源台)and get off the bus at Sengoku kougen : 仙石高原. It takes approx 30min and costs 880yen. After that, turn the corner onto Daihakone street. After 10min walk, you will find Daihakone Ichinoyu at the cross road.
< From Tokyo >
By Tomei high way Atsugi IC, in way of Odawara Atsugi way, it takes about 4 km from Hakoneguchi IC.
< From Nagoya >
From Gotemba IC of Tomei Highway, it is about 12km via Otome Touge Pass to Sengokuhara.