I was the one thing we didn't do in Japan. Everyone got a bucket-list item and mine was Sumo.
If you get a chance to see Sumo, do it. It us only odd months for like one weekend. It takes some planning.
The Yomiuri Giants are considered the Yankees. If you are staying in Tokyo, there are several teams around the bay.
Broader info... if you plan to go to multiple cities... get the Rail Pass. You have to get it in advance... they send it to your house to get tourist rate. The Shinkansen was cool.
Hotel is by person + per bed. Most rooms are 2adults +infant max. They are small even by euro studs.
We stayed in Odaiba at the Hilton. Odaiba was a nice place. Likely different as it was an Olympic venue site. We let our kids venture alone. 10-16, we gave them Yen and told them to watch out for each other. There is a Gundam store there and a huge Gundam. Kid's bucket-list. We also did a tour of the bay. It was a dinner theater. Awesome. We did the fish market. It was moved for the Olympics but I suspect still spectacular. I found a Sushi making experience. It included the fish market where they showed us the tuna we were going to use. He literally cut off a slab dmfrom a fish delivered that morning and by noon we were eating it. We paid extra for a Sake tasting/pairing. Did the tower whatever that was called.
We also stayed in Odawara. The Hilton resort was the knlynlmace I found tharmt we could all be in one room. Mostly Japanese speakers, but we managed. The locals asked what we were doing because that was where the Japanese vacation. From there, we did Hakone (we stumbled into it as a destination). Must do, IMO.
Nagoya (Sumo).
My youngest went back on a school trip as a Sophomore. He loved it that much. He went to Odaka and Kyoto, in addition to Hakone and Tokyo.
My oldest was disappointed we didn't do Kyoto nor Hiroshima/Nagasaki. He is a history gury.
11 days. Wasn't enough time (missed baseball), but financially, we spent about $5k per person including flights and hotels.
If you are interested DFW... Flights were $2300 from dfw to NRT. We drove to Waco, and added a Waco to DFW and the price dropped to $1800.
Kids and wife were over the moon.
Have a great time. Do research. Enjoy.