i just went again today. open 11am-2pm for lunch near grand central on w44th/madison, CHIKUBU's friday only shoyu roast pork ramen soup lunch special is still stellar as always.
best to sit at the sushi bar. here's a tip: if you take your time, i know that is asking a lot, but if you do and you mush the roast pork in and add the sides it gets even better as you go along.
for $10 this is far and away the best lunch dish in the city if you ask me. if you go prepare to wait on line, but service is speedy and sweet.