Mitsuboshi Socks peaked at ¥8B in 1986 — bankrupt 40 years later

Mitsuboshi Socks was founded in April 1948 in Nara prefecture, the heart of Japan's sock industry, and grew into one of its established mass producers: casual socks and stockings made in its own factories and with Chinese partners, sold to apparel chains, supermarkets and mail-order houses. At its peak in 1986 the company turned over roughly ¥8 billion.

The retreat began with stockings. Cheap imports and shifting preferences pushed Mitsuboshi out of pantyhose and stockings by 2011, and the pivot to medical and compression socks — high-function, smaller niches — never replaced the lost volume. The borrowing built up in the ¥8-billion years stayed on the balance sheet while sales shrank.

Recurring cash shortages surfaced on 25 July 2025; the business had already suspended on 1 July. Mitsuboshi Socks applied for bankruptcy on 12 December 2025 and related company Mitsuboshi Sangyo on 15 December; the Nara District Court's Katsuragi branch ordered commencement on 7 January 2026. Combined liabilities were about ¥3.24 billion across roughly 90 creditors — and within six months another old Nara hosiery name, Fukunishi Meriyasu, followed it into bankruptcy.

Exiting stockings removed the volume product; medical socks, a niche, could not replace it, and ¥8B-era debt outlived the sales.

Exiting stockings removed the volume product, and medical socks — a niche with no mass channel — could not replace it.

Debt from the ¥8-billion era outlived the sales that had justified it.

Decades of OEM and chain-store pricing left no brand margin to absorb the import shock.

Leaving a declining product line is half the decision; the other half is what replaces its volume. Mitsuboshi cut stockings but found no replacement, and debt from the big years outlived the pivot.

A bankruptcy trustee took over the estate. Nara's hosiery cluster kept thinning: Fukunishi Meriyasu, another 1951-founded local maker with ¥5.4B peak sales, went bankrupt in June 2026 with about ¥2.3B in liabilities across three companies — two old names of the same district gone within half a year.