I see four Priority Pass lounges at Narita covered by Priority Pass (CSR). I was thinking to try more than one.

I start landside and I have about 4 hours to use before I need to report to the gate. My gate is 56 Terminal 1

Which lounges should I check out and which lounge of these has the best food? Do any have showers:
ANA Lounge
ANA Lounge
IASS Executive Lounge.. only one landside?
KAL Business Lounge