Yeah, I was getting my Japanese visa and noticed the office wasn't that far from Shinagawa Station, so I decided to walk. Everyone thought it was super-weird I would walk that, where any Tokyo native would take the bus. It was 2km, so, there's a data point on what's considered an excessive walk in Tokyo.
But I'm a person who would take a whole Saturday and spend 8hr walking through San Francisco or Seattle or NYC for fun.
I averaged 16400 steps a day for the entire year in Japan.
I don’t think walking is weird, but the route from Shinagawa station to the immigration office is weird. I’ve walked that route. It’s an industrial area and nothing to see.
But I'm a person who would take a whole Saturday and spend 8hr walking through San Francisco or Seattle or NYC for fun.