Slip-sliding awayTHE heat-induced fatigue that strikes millions during Japan’s high summer is known as natsu-bate. A popular antidote is grilled eel, drenched in a sweet sauce and often served on a bed of rice. Rich in vitamins, protein and calcium, the restorative powers of the oily treat are eulogised in popular television shows. Yet unfortunately for Japan, the main ingredient is running out. Overfishing has wr
