I am really looking forward to attending a local festival for all things Japanese.
Booths for food and activities, a stage with musical and dance performances,
and my favourite Japanese shop in central Oslo will probably be selling products I
enjoy (mostly food and sweets).

The festival grounds are an old farm, just large enough to hold masses of Japan
enthusiasts coming and going from all over the city of Oslo for a few hours.
The weather is getting better, but a forecast check isn't a bad idea.