One example: employees of the Tokyo Metropolitan Government's Ministry of Environment will be permitted to wear jeans (without rips or holes), T-shirts (solid colors only) and Hawaiian shirts to work as part of its own campaign, which kicks off June 1 and aims to reduce peak usage during summer by 15%. Hopefully private companies to follow its lead (Tokyo and the rest of the Kanto region is serviced by TEPCO).
"Where last year the most that a hot-under-the-collar salaryman could get away with was ditching the coat and tie, this year he can lose the collar altogether," Barron writes.
I hope for my husband's sake that his employer is similarly inspired to at least allow the T-shirts, if not the cabana-wear. He can always try the Tsumetai backpack, from AnzenYouhin.jp, as seen in TimeOutTokyo (yes those are ice packs and I believe they're meant to be positioned between your shoulder blades):