Japan's top convenience store chain has decided to review its longtime policy of keeping almost all its stores open 24 hours a day amid growing calls from store owners for measures to cope with a dire labor shortage in the graying country.Seven-Eleven Japan Co. officials said March 1 that the Tokyo-based company will launch a pilot project from mid-March in which it will keep 10 stores it directly operates open for only 16 hours a day, between 7 a.m. and 11 p.m.The plan came after a group of convenience store owners called on Seven-Eleven Japan on Feb. 27 to review the practice of asking al…READ FULL ARTICLE