The 10.2% year-on-year rise in the corporate goods price index (CGPI), which measures the price companies charge each other for their goods and services, exceeded a median market forecast for a 9.5% gain, Bank of Japan data showed.
"While inflationary pressure from imports is easing, firms are still passing on rising input costs at home," said Takeshi Minami, chief economist at Norinchukin Research Institute.
"But such price pressure will gradually weaken with commodity inflation peaking out, and major economies likely to stagnate in the first half of this year," he said.
For 2022, wholesale prices rose 9.7% on average from the previous year, hitting a record high since comparable data became available in 1981.
Data due out on Friday is expected to show Japan's core consumer prices rose 4.0% in December, double the BOJ's 2% target and a fresh 41-year-high, in a sign of rising living costs for households, according to a Reuters poll.