UMIMORI / OUR BLUE CLASSROOM
What would you like to do at the coast?
Connect what you learn with what you need to check. Start with swimming or exploring a rocky shore.
Your day by the sea
Children should explore with adults. Fishing, stand-up paddleboarding and boating need different skills and equipment. See the Japan Coast Guard’s activity guides (Japanese) ↗.
Go swimming
Open the checklistChoose your beach
Check official opening dates, hours, swimming areas and lifeguard coverage.
Understand the conditions
Learn about hidden currents and the effect of wind on inflatables.
Check on arrival
Follow swimming restrictions, signs and flags. Decide which adults will supervise children.
Explore before you go.
Wind, waves and drifting offshore
Explore the lessonWhat is a rip current?
Explore the lessonWhere do waves come from?
Explore the lessonOfficial activity guidance (Japanese) ↗ · Sources checked: 2026-09-20
Explore tide pools
Open the checklistCheck the place and tides
Look up access rules, that day’s tide and weather, and the route back.
Look for habitats
Observe rock surfaces, cracks and seaweed without moving animals or their surroundings.
Notice changes and return
Keep checking waves, water level, footing and local instructions. Do not rely on a planned time alone.
Explore before you go.
A small world in a tide pool
Explore the lessonWhy do tides rise and fall?
Explore the lessonTiny life, ocean-wide connections
Explore the lessonOfficial activity guidance (Japanese) ↗ · Sources checked: 2026-09-20
General learning and preparation guidance, awaiting specialist review. It cannot decide whether an activity is safe at a particular place.