(I would make comments the next time on transportation in your Tokyo trips.)
[Pokémon Center]
do you know if there are any Pokemon or Lego centre around Osaka or Tokyo? - List of Pokémon Centers
http://www.pokemon.co.jp/gp/pokecen/english/ The following three Pokémon Centers will not have closed days during this April.
Pokémon Center Osaka is near Osaka Station of JR-West and Umeda Stations of subway, Hanshin and Hankyu.
Pokémon Center Tokyo is near Hamamatsucho Station of JR-East.
You can travel by monorail from nearby Monorail Hamamatsucho Station to Haneda Airport International Terminal Station.
If you choose Pokémon Center Tokyo, I recommend staying closer to it after visiting TDR.
(It requires at least 2 hours to make a roundtrip from Hamamatsucho Station to a TDR Partner hotel / Official hotel, which sound too long to consume just for picking up your luggage.)
Pokémon Center TOKYO-BAY is near Minami-Funabashi Station, which is a little further from Tokyo Station on Keiyo Line than Maihama and Shin-Urayasu Stations.
If you choose Pokémon Center TOKYO-BAY, you may hope to take a limousine bus to Haneda Airport after picking up your luggage. In that case, you had better leave the Pokémon Center by 5 pm.
http://www.limousinebus.co.jp/en/bus_services/haneda/shinurayasu.htmlhttp://www.limousinebus.co.jp/en/bus_services/haneda/tdr.html[Transportation passes, cards and tickets: continued]
Hankyu, Hanshin Electric Railway and Nankai Electric Railway are non-JR companies.
JR companies are not operating subway lines.
(Some subway lines go partly on or above the ground. Some JR lines have underground parts, but they are not regarded as subway.)
You can check in this article how to use an IC transportation card (explained under "Basic Use").
http://www.japan-guide.com/e/e2359_003.htmlEach of you except the 11-year-old child can get issued an ICOCA Card at a ticket-vending machine with an ICOCA icon in a major JR-West station, paying 2000 yen in cash, which includes 500 yen for a deposit.
http://www.jr-odekake.net/icoca/about/img/index_kind_img01-1.jpgA young child to whom a child rate applies should register his/her name and date of birth when he/she gets issued an IC transportation card, which is possible only at manned counters.
(Alternatively you can purchase a child-rate paper ticket, either using one of your IC cards or paying in cash, at every time the others travel with IC cards.)
An ICOCA Card can be used on many bus and railroad (including subway) lines not only in Kansai Region but also in and around Tokyo. Some major exceptions are Kyoto City Bus, Kyoto Bus and Eizan Electric Railway lines in Kyoto, JR Shinkansen lines, and Tama Monorail and Ueno Park Monorail lines in Tokyo.
Your ICOCA Card can be returned only to JR-West.
You can use e-money stored on your ICOCA Card at shops and drink-vending machines which accept IC transportation cards, except those which only accept (non-JR) PiTaPa Cards.
At shops of major convenience store chains you can recharge your ICOCA Card, paying in cash.