To be honest, if you're 5' 11" (which I am) and still feel a Jap Cruiser is too small, then no Jap bike will suit you.
Primarily they're built from the Japanese perspective, which as an average is slightly smaller than us Western lot.
They make 'em bigger than their average, but some do still have problems.
You have the option of altering the bars and adding extended foot controls.
The other choice is something BIG like a Victory.
The 8-Ball is a nice one to try for starters.
Engine size will be a factor, if you're after performance. But as a new rider, especially in this traffic-heavy country, the last thing you want is 1900 CCs (or even as much as 2300) of low-end torque waiting to surprise you while you learn the finer points of throttle and clutch control. You'd blast into the car in front like a Cruise Missile.
Either way, I think you are ill-advised to be hopping on a litre+ bike as your first ride, regardless of bike type.
This is the typical Short-Lived Summer Biker syndrome.
Rule Number 1 - Stay Safe.