What is the name of the NANGA sleeping bag inspired by the Doctor Yellow T4 fleet?

The sleeping bag is called the 'Doctor Yellow Sleeping Bag' inspired by the Doctor Yellow T4 fleet.

Which brand collaborated with JR Central on the Doctor Yellow sleeping bag project?

NANGA collaborated with JR Central on the Doctor Yellow sleeping bag project.

When does the crowdfunding campaign for the Doctor Yellow sleeping bag end?

The crowdfunding campaign ends on June 30 as announced by JR Central and NANGA.

What specific train fleet inspired the design of the NANGA sleeping bag?

The Doctor Yellow T4 fleet specifically inspired the design of the NANGA sleeping bag.

On what date did JR Central and NANGA start their crowdfunding campaign?

JR Central and NANGA started their crowdfunding campaign on May 19.

[JR Central] NANGA creates a "serious" Doctor Yellow sleeping bag. The first collaboration between JR Central and NANGA is born.

Published May 20, 2026 12:00 AM ・ Updated Jun 14, 2026 3:45 PM ・ 5 min read ・ Source: PR TIMES

JR Central and NANGA are launching a crowdfunding project for a collaborative sleeping bag inspired by the Doctor Yellow T4 fleet. Developed with NANGA's specialized technology, the campaign runs from May 19 to June 30.

Central Japan Railway Company (JR Central) and NANGA Inc. have announced their first-ever collaboration: a project to produce the 'Doctor Yellow SLEEPING BAG' through crowdfunding.

Maibara City in Shiga Prefecture, where NANGA is headquartered, lies along the tracks once served by the Doctor Yellow (T4 fleet), which retired in January last year. Having spent over 30 years in this region crafting high-quality down products capable of enduring harsh conditions, the manufacturer has applied its unwavering passion and refined technical expertise to bring this project to life.

1. Project Overview The official JR Central x NANGA 'Doctor Yellow SLEEPING BAG' project is a pre-sale via crowdfunding, with production confirmed upon reaching the target funding goal. Campaign Period: May 19, 2026 (Tue) 15:00 – June 30, 2026 (Tue) 23:59 Target Goal: 3,500,000 yen Format: All or Nothing Operator: NANGA Inc. URL: https://market.jr-central.co.jp/shop/crowd_funding/project.aspx?project=nanga

2. Support Plans ① Standard Plan: 77,000 yen (tax included) ② Early Bird Plan (10% OFF): 69,300 yen (tax included) *Limited to 30 units ③ Early Bird Plan (5% OFF): 73,150 yen (tax included) *Limited to 40 units ④ Factory Tour Included Plan: 88,000 yen (tax included) *Limited to 3 units

3. Shipping Schedule First 100 units: Scheduled for mid-November 2026 Up to 400 units: Expected shipping between summer and autumn 2027

4. What it means for NANGA to make it "seriously" From the day they decided to make the Doctor Yellow sleeping bag, NANGA's factory underwent dozens of trials. To replicate that vibrant yellow color such that it wouldn't fade even in harsh outdoor environments, the two companies held repeated meetings and refined the samples.

Specifications: - Fabric: Surface: 40dn Nylon (AURORA-TEX®), Back: 15dn Ripstop Nylon - Construction: Trapezoidal box quilt structure - Down: Spanish Duck 90/10 (760FP) - Down weight: 600g - Comfort temperature: -4°C to -11°C (4-season support) - Total weight: Approx. 1,170g - Size: Regular (Suitable for heights up to 178cm)

About NANGA Founded in 1941 in Maibara City, Shiga Prefecture, as Yokota Sewing. For over 30 years, NANGA has been manufacturing down sleeping bags in its domestic factory that can be entrusted with lives in extreme cold.

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Source: PR TIMES
Category: New Product

[JR Central] NANGA creates a "serious" Doctor Yellow sleeping bag. The first collaboration between JR Central and NANGA is born.

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