Subregions- Alamagan region, Northern Mariana Islands
 - Anatahan region, Northern Mariana Islands
- Bonin Islands, Japan region
- Izu Islands, Japan region
- Mariana Islands region
- Maug Islands region, Northern Mariana Islands
- Pagan region, Northern Mariana Islands
- Rota region, Northern Mariana Islands
- Saipan region, Northern Mariana Islands
- Volcano Islands, Japan region
- west of the Mariana Islands
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