Snorkeling

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Lake Hamana is a brackish lake where seawater and freshwater mix. However, here at Bentenjima, being closer to the Enshunada, the salinity is higher, and the water clarity is relatively good.

Additionally, please be cautious about the location and timing, as the tide can flow rapidly depending on the time of day. Since it is a brackish lake, how about crossing to the Natural Tidal Flats - Ikarise, where a variety of creatures inhabit, and taking a underwater exploration with the instructor?

No diving license is required, so you can easily experience it.

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Fishing

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Embark on a ferry to reach the Natural Tidal Flats - Ikarise, located just in front of Bentenjima, and take on the challenge of fishing using lures!

In the vicinity of the Natural Tidal Flats - Ikarise the water becomes shallow, and in the past, it was a paradise for black sea bream fishing due to the abundance of clams, shrimp, and crabs. Unfortunately, due to the impact of global warming, there has been a decline in clam harvesting, particularly for clams, leading to the temporary suspension of clam digging activities.

Due to such factors, there has been an increase in black sea bream, leading to a decline in catches of 'clams, shrimp, and crabs.' As a result, there has been a rise in damage caused by 'oysters and seaweed' as substitutes. As a preventive measure, farmers install nets to prevent black sea bream from entering. As a measure against food damage, let's catch and enjoy the delicious black sea bream from Lake Hamana.

※Fishing is prohibited in Kaihin Kouen during the sea bathing period (fishing is allowed in Ikarise)

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Observation session of
marine life at Natural
Tidal Flats – Ikarise

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The marine life observation sessions, led by members of the experienced boat association with a wealth of knowledge in fisheries are not only enjoyable for children but also offer valuable content that attracts participation from university research institutions.

As we disembark on Ikarise by ferry and begin exploring for marine life, the cheers echoes not only from the children but also resonates with cheers from the adults. We may also cover changes in organisms and plants due to environmental changes in Lake Hamana, as well as attack the microplastic pollution.