It's mottainai if unwanted things occupies much space at home.
I'm going to Japan for a week from today. I'll be staying in a very surburb area from Tokyo, where I can't expect to be intrested in so much things. I'll be with my colleague who has never been to Tokyo, so all I can do is helping him during his first trip to Japan.
I'm taking unwanted underwears to Japan because there might be no time to wash them. I'll just dump used one and wear another everyday. Beside I would buy new ones there, so that the underwears will be replaced with new one. Japanese underwear is quite confortable maybe because of good textile technologie.
I'm looking forward nothing more. I'll be busy in the plane to Japan by making a presentation data, which makes me quite nervous.