Daniel, what a fierce cousin you are!
Chihiro is just 5 years old, and this will be the first time you meet her. Don't you think it's a little bit ... cruel to treat her like that (especially the first 3 sentences).
Since her first language is Japanese, let me give you some more "friendly" sentences. LOL!
"That's cute!/You are cute!" -- Kawaii desu ne (literally= is cute)
"Are you hungry?" -- Onaka ga sukimasu ka?
"Are you tired?" -- Tsukaremasu ka?
"What do you want?" -- Nani ga hoshii?
Also, from part of your sentences:
"Please wait." -- Chotto Matte.
"Where do you want to go now?" -- Ima, doko e ikitai?
Pronounce it as if you are pronouncing Tagalog, if you pronounce it in english way, then she will never understand you.
For instance -- Matte (wait) is actually formed by 2 sounds Mat-te, if you pronounce it using english way, then it becomes 1 sound -- Matte.
All the best. Tell us when she is here.
Sinagbayan, hi! We are so close to each other (I'm from Malaysia), nice to see you joining us. Enjoy yourself here.
Me,
Lyle.