June Speed Masters at Makuhari
Eight categories and a June-only bonus challenge at Makuhari.
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News and updates
The latest opening information, events and offers from Harbor Circuit.
Chiba Citizens’ Day: June 15
Enjoy special offers at Harbor Circuit for Chiba Citizens’ Day.
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Speed Masters 7+1: April 2026 results
April’s monthly results. Prizes must be collected by the end of May 2026.
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Takuma Kids Kart Challenge 2026 at Makuhari
Time trials run from May 1 to September 30. Elementary-school children, including beginners, are welcome.
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