KATO 10-1640 ships with KATO tight-lock couplers. No replacement part is officially listed for this product.
| Maker | KATO |
|---|---|
| Product No. | 10-1640 |
| Name | E657 Series "Hitachi/Tokiwa" 4-car add-on set |
| Name (Japanese) | E657系「ひたち・ときわ」4両増結セット |
| Type | Set |
| Category | EMU |
| Release | 2023-09 |
| JAN | 4949727691756 |
| Standard coupler | KATO tight-lock |
| Coupler notes | KATO tight-lock coupler (body-mounted) |
| Evidence | Not stated |
| Source | Official product page |
| Last checked | 2026-10-28 |
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