The Type B1 submarine (also known as the I-15 series) were the most numerous submarine class of the Imperial Japanese Navy during World War II. In total 20 were built, starting with I-15, which gave the series their alternative name.
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/ZWNolioJUcdb_l_HUowbBg== | 5.88129e-14 |
| dbr:Type_B1_submarine | 5.88129e-14 |
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