From Komaba Todai mae (駒場東大前) to Monzen-Nakacho (門前仲町)
Inokashira line (井の頭線): Komaba Todai mae (駒場東大前) → Shibuya (渋谷)
Hanzomon line (半蔵門線): Shibuya (渋谷) → Kudanshita (九段下)
Tozai line (東西線): Kudanshita (九段下) → Monzen-Nakacho (門前仲町)
See this video for changing trains at Shibuya (渋谷).
See this video for changing trains at Kudanshita (九段下).
Entrance No. 1 or No. 2 of Monzen-Nakacho (門前仲町) station are the nearest to
Tokyu-Stay Monzen-Nakacho (東急ステイ門前仲町).
Alternative options using