[JohnBraden]

Originally Posted by sweetokyo

I was kind of hesitant on what I said so I researched the subject,
One can use a Pasmo card for JR East Lines, Tokyo Monorail, Tokyo Waterfront Area Rapid Transit (Rinkai Line), Saitama Shintosi Kotsu, Izukyu, Sendai Airport Transit, and JR Bus Kanto.
http://www.pasmo.co.jp/en/pdf/pasmo_traveler_E.pdf

For Suica: Suica & Monorail | Fares & Passes | JR-EAST

Both Suica and Pasmo are the same concept when it comes to a tourist's convenience.

Expanding on those you mentioned for SUICA:

Transit systems/lines usable with the Suica card include:

Suica
East Japan Railway Company (JR East) lines in the Kanto, Niigata and Sendai areas
Tokyo Monorail
Saitama New Urban Transit (New Shuttle)
Sendai Airport Transit [7]
Izu Kyūkō Line (from Spring 2010)
Tokyo Waterfront Area Rapid Transit (Rinkai Line)

Other transit systems outside of the Suica system where Suica can be used include:

Kitaca
Hokkaido Railway Company (JR Hokkaido) lines in the Sapporo area
TOICA
Central Japan Railway Company (JR Central) lines in the Greater Nagoya area
ICOCA
West Japan Railway Company (JR West) lines in the Greater Osaka, Okayama and Hiroshima areas
PASMO
SUGOCA
Kyushu Railway Company (JR Kyushu) lines in Fukuoka area.
Hayakaken
Fukuoka City Subway
nimoca
Nishitetsu
Mejiron nimoca (from December 26, 2010)
Private bus operators in Oita area.