Boutique advisers specializing in micro mergers and acquisitions for mostly family-run firms are enjoying a boom as the aging, shrinking population puts the squeeze on Japan¡¯s small business landscape.

There are no industrywide figures for deals between ?500 million and ?1 billion, but boutique advisers say they are benefiting as owners look to merge their businesses to cope with dwindling demand or as they reach retirement without a successor.

Japan¡¯s population, already the oldest among developed economies, is projected to shrink by a third by 2060.