We had to get up early the next morning to meet me ex-gf Yumiko, who had kindly gotten us tickets for the Ghibli Museum, so we talked about going out, but ended up falling asleep around 8pm local time. I think we woke up at 6, which was just as well. We met my ex right on time, and chatted briefly before she had to head to work. My sister and I had discussed going to Tsukiji since it was still early, but instead we decided to just go back to the hotel and laze around for a while, as our tickets didn't allow entry until 2pm. Katy got her first real exposure to Japanese convenience store food and TV, and lazing was had. Around noon, we went to Kichijoji, and started to amble our way through Inokashira Park towards the museum. It's a much nicer route to go through the park than to go to Mitaka station, like the official guides recommend; that walk is really pretty dull, with not much to be said for it other than the charming "Ghibli Museum, 1200m" signs.
I've been to the Ghibli Museum at least three or four times now, and each time has been a pleasure. It's not that large, but the grounds are immaculate, there's stained glass depicting Ghibli movie scenes everywhere, and the entire experience is just charming. The only kink is that tickets are limited; JTB will sell you tickets in advance, but they'll often run out and be super slow to inform you of this fact (or to bother updating their website.) If you're lucky, already in Japan, and have a flexible schedule, you can go to a Lawson convenience store and use the Loppi machine to purchase tickets; they usually do have tickets available a week or two in advance, and they're half as expensive that way.
Anyhow, my sister was completely enchanted by the Ghibli Museum, so yay. Took the Ghibli-liveried bus back to Mitaka station and went back to the hotel. Don't remember what we ate that night; we were still rather jet-lagged and out of it. That it was Tokyo in late July - i.e. around 80% humidity and in the low 30s Centigrade/high 80s-to-low-90s Fahrenheit - did not help our exuberance; my sister is like mom in that she doesn't handle that sort of weather well. That's what scheduling allowed for, though.