That push was boosted last week when Uniqlo operator Fast Retailing Co (9983.T) said it would raise wages by as much as 40%.
Another 29% said they would carry out regular pay increases only, while 38% were undecided.
"Prime Minister Kishida has been saying raise wages, raise wages, but the decision to hike pay isn't done on the words of a prime minister or president," said Masayuki Kubota, chief strategist at Rakuten Securities.
Smaller firms generally cannot increase pay, business owners, economists and officials say, because they often struggle to pass on higher costs out of fear of losing customers.
The Reuters Corporate Survey, conducted for Reuters by Nikkei Research between Dec. 23 and Jan. 13, canvassed 495 big non-financial Japanese firms on condition of anonymity, allowing them to speak more freely.