Leaving in 3 days!!

Hello!

I'm going to Japan for 5 nights/6 days and here's my itinerary:

Day 1 Haneda - Kawaguchiko Sta
Day 2 Kawaguchiko Sta - Tokyo
Day 3 Tokyo
Day 4 Tokyo - Kyoto
Day 5 Kyoto - Osaka
Day 6 Osaka - Narita
*Day 6 Osaka-Narita - Ichinoseki

*Additionally, my boyfriend will continue to Tohoku (Ichinoseki) on Day 6

Is it worth it to get the JR Pass?

Thanks in advance!!