I went to Seacon square Srinakarin and asked the information of there. They told me that the robot restaurant not open in this year 2015. There are the other branch at Monopoly Park plaza on Rama 3 Rd. and Central Pattaya . This is update information or u can contact truly +66 2 683 1670 , +66 2 683 11 91.
.....so waste my time to find this restaurant in Bangkok ......

Been to this interesting restaurant last year in 2014. This is a new concept Japanese restaurant where you are served by a dancing robots ! Kids totally love it !
Last read they had permanently closed their branch at MonopolyPark, and relocating to SeaconSquare ( opening May 2015 ).
Seacon Square is one of the largest shopping malls in Bangkok. It is also near the Srinakarin Railway Night Market located at Srinakarin Soi 51, so you can eat at Hajime and follow by a visit to the night market.

Direction to Seacon Square
Location: Srinakarin Road (midway between On Nut Road and Bangna-Trad Road)
BTS: Take a taxi from On Nut station

I have been here before on many occasions, especially because i always go to Monopoly Park mall to visit the Zenred Salon bangkok in the same building. (excellent salon by the way definitely worth a visit) When i go to Hajime the food is very good if you like buffet, its more fun if you go with a few friends. it is definitely a novelty place but the price is very affordable considering the robot cost millions of doillars.
The robots will serve you through a hole in the wall, as they are protected behind a screen. Hajime has also been closed for the last few months because one of the robots needed sending back to Japan for servicing. The Robot staff will be back next month June and ready to perform again i have been told.

Went on the 15th of Jan 2015 and it was closed permanently. Shame cos I was really looking forward to it, but went to condoms and cabbages instead - worth visiting

We went on January 8 2015 and the place is permanently closed.

There was a note saying they will open new restaurants around Thailand. But none was found in Bangkok in that note.

:(