I've got an event information for this month.
I translated it so, I'll post about it today.
【Otaru Lighting up Strolling Tour】
Every Tuesday and Friday until October
Schedule... 6 pm~ required about 45 minutes
Place... Former Temiya railway Ironai station
Access... 10 minutes walk from JR Otaru station
★Tour around illuminated historical buildings with guides. Depart Ironai station and break up at Otaru canal. Unnecessary for reservation. Free of charge.