From Nishi-Kasai Metro to Waseda(Subway). 26 min ¥240. From Nishi-Kasai Metro to Monzen-Nakacho then subway to Higashi-Shinjuku. 40 min ¥530. From Nishi-Kasai Station taxi to Shinjuku. 15 min ¥7714. From Nishi-Kasai Station drive to Shinjuku. 15 min ¥235.
How to get from Nishi-Kasai Station to Shinjuku?
Tokyo Metro operates a vehicle from Nishi-Kasai Station to Shinjuku every 10 minutes. Tickets cost $2 - $3 and the journey takes 26 min.