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Aquamarine Fukushima — Interactive Marine Park & Kuroshio Exhibits

Published: Jul 22, 2026
Updated: Jul 22, 2026
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Aquamarine Fukushima — Interactive Marine Park & Kuroshio Exhibits
Aquamarine Fukushima — Interactive Marine Park & Kuroshio Exhibits 2

Aquamarine Fukushima (アクアマリンふくしま) is a world-class marine science museum combining aquarium, interactive exhibits, and environmental education facilities along the Iwaki coast. The complex is architecturally striking — a glass-and-steel triangular building resembling a lighthouse beacon, housing 4,000+ marine creatures across 60+ tanks. The centerpiece is the massive Shiome-no-Umi (潮目の海, 'Meeting Seas') tank (2,000 tons) representing the confluence of the warm Kuroshio Current and cold Oyashio Current off Fukushima's coast — the world's richest fishing grounds where Pacific bluefin tuna, bonito, sardines, and jellies swim together in a recreation of the open ocean ecosystem.

Unlike traditional aquariums focused on entertainment, Aquamarine emphasizes ecological education and conservation. Exhibits explain the Kuroshio-Oyashio mixing zone's importance to global marine biodiversity, sustainable fishing practices, and tsunami recovery efforts (the facility was heavily damaged by the 2011 tsunami and reopened in 2012). Interactive zones include touch pools with starfish and sea cucumbers, glass-bottom boat tours over seal habitats, and behind-the-scenes glimpses of aquarium operations. The rooftop offers panoramic Pacific Ocean views and houses the Janome Beach tide pool recreation.

Essential Information

Getting There

Access Information

Onahama, Iwaki. 15-min bus from Izumi Station (JR Joban Line). Entry: ¥1,850 (adults), ¥900 (ages 6–18). Hours: 9:00–17:30 (last entry 16:30). Visit duration: 2–3 hours. Combine with Iwaki Yumoto Onsen (15-min bus, onsen town). Parking: ¥500.

Insider Guide

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**Shiome-no-Umi tank timing:** The Kuroshio tank has scheduled feeding demonstrations (11:00 and 15:00, 20 minutes) when divers hand-feed bonito and sardines, creating swirling bait balls visible through the 9-meter-wide viewing window. Arrive 10 minutes early for front-row positioning. The feeding triggers hunting behavior — watching tuna accelerate to 60 km/h in short bursts provides rare insight into pelagic predator dynamics. This is one of few aquariums globally exhibiting Pacific bluefin tuna (endangered species, difficult to maintain in captivity). **Interactive zones:** The touch pools (Ground Floor, Aquamarine Passage) allow handling starfish, sea cucumbers, horseshoe crabs, and small sharks under staff supervision. The most unique interactive is the transparent floor section where visitors walk over seal tanks — seals swim directly beneath your feet, creating disorienting perspective. The Janome Beach (rooftop) is a recreated tide pool ecosystem where visitors can wade ankle-deep (free loaner boots) and observe hermit crabs, small fish, and sea anemones — excellent for children and educational for understanding intertidal ecology. **Post-tsunami context:** The 2011 Tohoku tsunami inundated Aquamarine with 4-meter waves, killing 90% of animals and destroying exhibits. The facility reopened in 2012 after intensive rebuilding and restocking. Several exhibits specifically address tsunami ecology — how marine ecosystems recover, debris rafting species (organisms that crossed the Pacific on tsunami debris), and sustainable reconstruction. The resilience narrative adds emotional weight to the visit — this is not merely entertainment but a symbol of Fukushima's coastal recovery. Consider this context when visiting.

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