Nishino included former AC Milan forward Honda and Borussia Dortmund midfielder Shinji Kagawa, who reportedly did not see eye-to-eye with former coach Vahid Halilhodzic before he was suddenly sacked in April, following a series of disappointing results, reports Efe.
Nishino is due to name his final, 23-man quad for the World Cup, which kicks off in June, by May 31.
"I expect to pick the World Cup squad from these 27 players," Nishino told the media.
"Honda and Kagawa have been core players of the national team, and I have called them up in the hope that they will be able to contribute."
The squad is heavy on experience, with no previously uncapped players included. The group's average age is 28, likely to be among the oldest at the tournament.
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