Amakudari

Every country has a revolving door between regulators and the regulated. Japan institutionalised it, gave it a poetic name and built a personnel system around it.

The mechanics follow the bureaucracy's career design, since elite officials retire young by Western standards and ministries place them into corporate boardrooms, industry associations and public corporations. The incentive alignment is the critique.

An official who expects a plush landing has reason to treat future hosts gently today, which is the textbook regulatory-capture problem in formal dress. The defence is expertise transfer, as defenders argue that retired officials carry deep policy knowledge into industry and that the practice coordinates Japan Inc. and smooths relations between state and market.

The system runs on obligation. Companies that accept descending officials gain access and forewarning of policy shifts, and in return they honour an informal tax that keeps the ministry's alumni system funded.

Scandals periodically expose the wiring, with collusive bidding, overlooked violations and cushy posts at favoured firms provoking public outrage and successive rounds of formal restriction. Reforms have tightened the rules, as cooling-off periods and approval requirements now limit direct moves into regulated industries, though placements through intermediaries have proven harder to stop.

Comparisons illuminate the general case, since revolving doors in Washington, Brussels and elsewhere share the same logic. Japan's version was simply more organised, expected and embedded in how ministries worked.

The economic cost is competition. Protected relationships favour incumbents over entrants, and scholars link the practice to the cosy stagnation of sectors where ministry guidance mattered most.

The practice also shaped corporate governance: ex-bureaucrats on boards brought government insight but sometimes weak challenge to management, which is why reformers have pushed for more independent directors. Foreign firms learned to hire the pattern too, since appointing respected former officials became a recognised market-entry strategy.

For a manager dealing with Japanese regulators or partners, the lesson is structural awareness: the ex-official across the table embodies a network whose loyalties and information flows an org chart never shows. For global investors, the concept is a due-diligence lens, since a board heavy with ex-officials signals both access and insulation, and reading that signal changes how regulatory risk is priced.