Consumers are already bearing the brunt of inflation that has hit a four-decade high above 4 per cent, even though the outcome of annual wage negotiations between labour unions and management for the new fiscal year will likely deliver the largest salary increases in three decades. [...] The spread of the avian flu is exacerbating the pain, sending the prices of eggs and products made with them, like mayonnaise, higher. Condiment makers Kewpie Corp. and Ajinomoto Co. are going ahead with their fourth price hike since July 2021. Kewpie's 450-gram mayonnaise will be sold at 520 yen, nearly a 10 per cent increase on the most recent hike. Other food items like cheese, yoghurt, ham and sausages will see their prices rise by around 30 per cent. The price of soy sauce, a daily necessity for many Japanese households, will be some 10 per cent higher.