By train
Use the Seibu Ikebukuro Line or the Seibu Shinjuku Line to Tokorozawa Station.

From Seibu Shinjuku Station (the starting Seibu Shinjuku Line station from Tokyo),use any Seibu Shinjuku Line train bound for Shin-Tokorozawa or Hon-Kawagoe.
The train ride from Seibu Shinjuku Station is about 30-40 minutes.

From Ikebukuro Station (the starting Seibu Ikebukuro Line station from Tokyo),use any Seibu Ikebukuro Line train bound for Kotesashi, Hannou, or Seibu Chichibu.
The train ride from Ikebukuro Station is about 25-35 minutes.

From Tokorozawa Station to the church
Exit from the South or West Exit.
The walk from Tokorozawa Station to the church takes about 5-10 minutes.