Find your next reason to race.Find your next reason to race.Find your next reason to race.
At a glance, by date and venue.
HARBOR CIRCUIT GUIDE
Find an event below, then open its poster for dates and entry details. Each Japanese poster has a short English summary to help you choose.
Makuhari
1–31 October 2026
October Speed Masters 8
Compete for October's best lap times across eight kart categories. No separate entry is needed, and the top three drivers in each category receive gift tickets. There is also an October-only PRO-JR bonus challenge. Check the poster for entry conditions.
From 1 October 2026, daily from 6pm
Mega-mori Night sessions
For Grade B drivers and above in standard karts. An 18-minute session costs ¥5,000. The first two sessions from 6pm offer 24 minutes for ¥6,000. The first adult-kart session at 6pm offers 30 minutes for ¥7,000, except Saturdays. Sales may stop depending on track conditions. Check the poster for full details.
Wednesdays
Ladies’ Day
Women can enjoy a six-minute drive for ¥1,000. Not available on public holidays or during special periods, including New Year, Golden Week and Obon.
Saturdays from 6:15pm
Saturday Night Harbor
Spend Saturday night on the track, with time attacks, sprint races and solo endurance races on different weeks. Open to drivers aged 15 and over with Grade B or above. Check the poster for arrival times and entry requirements.
Second and fourth Saturdays
Build your junior racing skills
Ready to work towards your next grade? Grade B junior kart drivers get two runs and driving advice for ¥5,000. Book ahead: each session has space for three drivers. Check the poster for times.
Kisarazu
From 6pm
Mega Night sessions
Make more time for the track with 18- or 24-minute sessions for Grade B drivers and above. A 30-minute adult-kart session is also available at 6pm only. Check the poster for last-entry times and conditions.
Wednesdays
Ladies’ Day
Women can enjoy a six-minute drive for ¥1,000. Not available on public holidays or during special periods, including New Year, Golden Week and Obon.
First and third Saturdays
Build your junior racing skills
Ready to work towards your next grade? Grade B junior kart drivers get two runs and driving advice for ¥5,000. Book ahead: each session has space for three drivers. Check the poster for times.