The final survey of 5,272 unions affiliated with Rengo showed an average pay hike of 3.58%, or 10,560 yen ($73.04) per month, the biggest increase since 3.9% seen in 1993.
Among them, SMEs raised wages by 3.23%, also the fastest pace in three decades.
What's important from now on is to bring real wages to positive territory," said Hisashi Yamada, economist and Hosei University professor.
The pay hikes could provide some political support for Prime Minister Fumio Kishida who has made wages as key part of his policy agenda, as a weak yen and higher import prices drive up living costs.
Big firms' summer bonus payments are seen rising 3.9%, up for a second straight year, although gains are likely to be uneven, according to a survey by Keidanren, Japan's biggest business lobby.
Persons:
Rengo, Kazuo Ueda, Hisashi Yamada, Fumio Kishida, Tetsushi Kajimoto, Sam Holmes
Organizations:
Rengo, Bank of Japan, Hosei University, OECD, Thomson
Locations:
TOKYO