Perhaps it's an extreme reaction to last year's Cult of the Sockless (resulting in odoriferous and prematurely damaged loafers).

WSJ: Men's Sock Options��Beyond Stripes

Although the market is not as odoriferous as you might think, you still do not want to wear your nicest clothing (and especially not your best shoes), and watch out for the electric carts zipping around the narrow aisles.

BBC: Tsukiji Market: Tokyo's famous seafood market