[trunker]

i've seen both the gift giving at first meet and gift giving later, but i seem to have experienced more gift giving right after introductions and business cards. since your visit is work related i think you can give them the gifts right after the business cards, like " and by the way we brought you a little souvenir from our aquarium".

if youre talking about the actual guides who take you around, if its not the boss, you can give them the gift at the end of the tour.

recieving is a bit more work,... look surprised, fawn over it, without opening, say oh you really didnt have to, but thank you very very very much and throw in as much bowing as you can.

i'm sure others will chime in with a fancier thank you than domo arigatogozaimashita.

gifts are always opened later.

chuck a fish a smaller fish for me, and i hope you have a good time there.