The tsum 1000 type was introduced in 1950 and was a typical ventilation freight car with a structure designed to allow ventilation to prevent perishable foods such as vegetables from being damaged during transportation, and was used all over the country. The tsum 1 type, which appeared as the first 15-ton ventilation freight car, was changed to the tsum 1000 type when it was modified with a two-stage link, but there are also vehicles that were newly built as the tsum 1000 type from the beginning.

• reproduce the detailed underfloor with brake levers and steps
• reproduce the unique appearance with ventilation holes throughout the car body
• printed car number
• can pass through mini-curves (when coupled with a locomotive that can pass through mini-curves)
• silver wheels