Landscapes & nature
Ariake Sea
Sea in Japan
Wikipedia names Ariake Sea as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Ariake Sea. Each title’s page links to the sentence that says so.
Takeshi's CastleSeries1986–TVmaze
Filming locations nearby
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Landmarks & buildings Miike coal mine
Japan · 14 km north-east
Coal mine in Fukuoka, Japan
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Towns & cities
Tamana
Japan · 18 km east
City in Kumamoto Prefecture, Japan
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Landscapes & nature
Shimabara Peninsula
Japan · 21 km south-west
Japanese peninsula
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Towns & cities
Kikusui
Japan · 23 km east
Dissolved municipality in Tamana district, Kumamoto prefecture, Japan
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Castles & palaces
Kumamoto Castle
Japan · 33 km east
Castle
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Towns & cities
Kumamoto
Japan · 33 km east
City in Kumamoto prefecture, Japan