These are four hotels in the proximity of the conference venue and are
 listed from the most to the least expensive.

 Hotel Grand Palace
 https://www.grandpalace.co.jp/english/index.html

 Apa Hotel Kudanshita
 https://www.apahotel.com.e.ju.hp.transer.com/language/shutoken/21_tokyo-kudanshita/index.html

 Diamond Hotel
 https://www.diamond-hotel.co.jp/index.html
 (Japanese web site)

 Sakura Hotel
 https://www.sakura-hotel.co.jp/