How to confirm a relationship with a Japanese girl?

in fact long keep short possible.

so... there's 1 japanese girl traveling home country (asia) , has settled in job.
not clueless not familiar either, i've been helping past few days going around, finding places stay her, shopping needs, etc.
believe continue months or years (as she's not familiar environment , still learning language too).

honest it's whole lot of tasks me daily, , life schedules totally changed have time.
until gets used environment , language, it's totally not safe travel herself around here, don't have heart leave in wild has no 1 here.
friends told me i've done , sacrificed much, both time , financial well, knew.
don't take wrong, don't know why i've been doing no burden in feeling @ (at least now).

in country's culture, girls don't confess guys.
confirm relationship, girls wait until guys confess, or hold hand, kiss once, etc, confirm more friends , wants step forward relationship.

heard in japanese culture, girls may confess guys if she's interested.
true?
how in japan guys-girls confirm relationship?
same mentioned above?
recommendations how should take next step?
recommendations how confirm relationship comfortable , not shocking ways japanese girl?

i've had many chances hold hand or maybe kiss cheek - indirectly show care her, , not being bold asking "would girlfriend" - didn't.
don't want scare off because things started, , ruin atmosphere if thinks otherwise.
@ same time, don't want give culture shock need learn best way feel comfortable with.

i'd appreciate input guys.

this in fact long keep short possible. so... there's 1 japanese girl traveling home country (asia) , has settled in job. not clueless not familiar either, i've been helping past few days going around, finding places stay for...

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