Odakyu Railways operates a train from Shimokitazawa to Shinjuku every 10 minutes. Tickets cost $1 - $2 and the journey takes 11 min.
How to get from Shimokitazawa to Shinjuku
From Shimo-Kitazawa train to Shinjuku(Jr). 11 min ¥159. From Shimokitazawa taxi to Shinjuku. 8 min ¥3788. From Shimokitazawa Uber to Shinjuku. 8 min ¥4266. From Shimokitazawa walk to Shinjuku. 1 h 22 min.