This Saturday from 11am there is a “character festival” in Kawagoe Kurari, a small shopping area with food and souvenirs housed in three former sake breweries. You can meet mascots and characters from the Kawagoe area, including Kawagoe city’s main mascot Tokimo, a sweet potato clock. There will be an opportunity to get your photo taken with the mascot.
Children who come in Halloween Costume will receive candy. There are other events and surprises planned for the day. It runs until 4pm. It will not take place, if it is raining.
Kawagoe Kurari is in walking distance of Hon Kawagoe and Kawagoe station. Their website (Japanese only) is https://www.machikawa.co.jp/ This event hosts information on a facebook page; https://www.facebook.com/小江戸蔵里キャラクター祭り-Reborn-346947485490475/photos/
We recently met Tokimo at another event: