Non Japanese speaking IT professional the following is your initial vocabulary
1. Sumimasen : Excuse Me
2. Arigato: Thank-you
3: Konichiwa : Hello
4. Gomen Nasai : Sorry
5: Haji Memashite: Glad to meet you (utilised when meeting some one for the first time)
6: Irrashaimase: Welcome
7: Onegaishimasu: Please
8: Wakarimashita: Iunderstand,, Wakarimasen: I don't understand
9. Namae: Name
10. Ittekimasu: Utilised while going out of home