“I thought it’d be cool for someone to make a film about bike messengers. Maybe I’ll make it myself.” Matsudo - Photo by Benjamin Parks

Flailing for a good example, I ask how long it would take to get from the Marunouchi Building to Roppongi Hills. The question inspires a quick-fire discussion that I struggle to keep up with.“That’s about four or five kilometers, right?”

“Probably five or six.”

“About 20 minutes.”

“That’s what you tell yourself, at least, but it won’t actually take that long.”

“Yeah, you could do it in 12 or 13 minutes.”

“Nah, eight minutes.”

“C’mon, that’s only if you’re running all the traffic lights…”