Family trip to Japan

Our family from Australia, with 4 adults and 2 kids (one 4 years and the other 10 months old) have the following itinerary. Haven't booked trains or hotels yet.
20/04/24 to 24/04/24 Visiting family in Nobeoka, Miyazaki, Fukuoka
24/04/24 Fukuoka to Hiroshima (overnight Miyajima island)
25/04/24 Hiroshima to Himeji (Castle) and to Osaka
26/04/24 Round trip to Nara
27/04/24 Osaka city, Dontonbori, Osaka Castle (3 nights in Osaka)
28/04/24 Osaka to Kyoto -Fushimi Inari, Gion district
29/04/24 Kyoto- Golden Pavilion, Arashiyama bamboo grove
30/04/24 Kyoto-Kiyomizu-dera, Higashiyama district, Kawaramachi shopping (3 nights in Kyoto)
01/05/24 Kyoto to Tokyo Disneyland (1 night)
02/05/24 Disneyland, afternoon train to a hotel in Tokyo, ?near Tokyo train station, Tokyo city tour
03/05/24 Tokyo city -sight seeing
04/05/24 Day trip to Mt Fuji & Hakone
05/05/24 Tokyo city-sight seeing
06/05/24 Day trip to Lake Kawaguchiko
07/05/24 Tokyo city
08/05/24 Day trip Kamakura
09/05/24 Tokyo city
10/05/24 Flying out from Narita airport

1. Does this itinerary include too many places considering we are travelling with kids?
2. I think JR pass for 1 week from 25/04 to 01/05 may not be cost effective for us? Please advise
3. Any advise about travelling with luggage and kids in trains

Thanks in advance
Sue