Ships - Diver Ships
Number of vessels owned: 8
Ship Name:Koshinmaru No.３
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 15.0 | 14.35 | 4.28 | 1.46 | 1.20 | 580 | 14 | Limited coastal | 5t roll |
Ship Name:Koshinmaru No.８
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 5.5 | 10.00 | 3.17 | 1.15 | 1.50 | 440 | 12 | Limited coastal | 5t roll |
Ship Name:Koshinmaru No.１１
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 5.9 | 11.62 | 2.85 | 1.11 | 1.30 | 430 | 8 | Limited coastal | 3t roll |
Ship Name:Koshinmaru No.１２
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 7.3 | 12.17 | 3.09 | 0.99 | 1.50 | 440 | 8 | Limited coastal | 5t roll |
Ship Name:Tosho
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 13 | 14.95 | 4.18 | 1.60 | 2.00 | 609 | 12 | Limited coastal | 5t roll |
Ship Name:Second Tosho
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 13 | 14.95 | 4.18 | 1.60 | 2.00 | 609 | 12 | Limited coastal | 5t roll |
Ship Name:Third Tosho
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 16 | 16.15 | 4.38 | 1.60 | 2.00 | 609 | 12 | Limited coastal | 5t roll |
Ship Name:Fifth Tosho
| Gross register tonn | Length: L | Width: B | Mold depth: D | Draft: d | Main engine PS | Crew: | Navigation area | Remarks |
| 16 | 16.15 | 4.38 | 1.60 | 2.00 | 609 | 12 | Limited coastal | 5t roll |
