I went to stay with Chiemi on the last 2 days in the Chiba countryside. It was a really nice and peaceful end to the whole trip. We did everyday things like going to the local bookstores and walking her cute little dog, Hana-chan (who very much looked like she would have preferred to remain under the kotatsu than go out into the cold).
Her mother was kind enough to drive me to the Umihotaru (海ほたる), halfway between where the Aqua-Line bridge dips down from the sea surface into an underwater tunnel. The view of the Tokyo Bay from there was just gorgeous.