Celtic fans needed some convincing before they got behind new manager Ange Postecoglou last month after he joined the club from Yokohama F. Marinos.

The Australian’s first major signing, Vissel Kobe talisman Kyogo Furuhashi, hasn’t needed nearly as much time to win over the green-and-white faithful, and for good reason.

Friday’s announcement of the 26-year-old attacker’s transfer arrived like a bolt from the blue — a description Celtic fans might object to on moral grounds, even if it represents a welcome relief from the weeks of rumors that usually foretell the club’s signings. Yet it carries tremendous upside for all involved and may be one of the most important pieces of business involving a J. Leaguer that we see this summer.