Candy Cab Electrical Questions (Japan to US/US to Japan)

[Shmup-o]

No intro, just going to jump in!

1. I need to plug my cab into a US outlet.  There should be 110 volts being output by the outlet and the Exceleena should be wanting 100 volts.  Now, I realize this will power the Exceleena, but should I be using a step down here to protect the cab just in case?

2. The Exceleena features an outlet within the cab.  I plan on having an amp, Dreamcast, PS2, and PC running off of this outlet via a power strip.  I am assuming that the Exceleena will be outputting 100 volts from that outlet.  I believe I need a step up here in order to protect my other electronics.  Correct?  Or would the Exceleena's output be more like a passthrough in this instance (if I just plugged it into the wall, it gets 110v and the cab's outlet would give 110v?)?

3. While researching products that step up, step down, or do both, I noticed that everything available is 110v/120v to 220v/240v and/or vice versa.  Wouldn't I need a 100 to 110 or 110 to 100 product to do what I want?

I never realized all of this would be so much work... and I didn't even build anything!