Does the JR pass suit our itinerary?

My husband and I are flying into Sapporo in March2026 and plan to tour Japan and fly home from Fukuoka in mid April.
Is the JR pass the most cost effective and best for our travel needs?
We will have around 17 - 18 travelling days as follows:

Sapporo to Hakodate
Hakodate to Tokyo
Tokyo to Hakone - thinking of using the Romance Train
Hakone Loop
Hakone to Nagano
Nagano to Matsumoto
Matsumoto to Kyoto
Day trip to Kyoto to Arashiyama
Kyoto to Osaka
Osaka to Hiroshima
Hiroshima to Fukuoka

Many thanks