This place in Sunatsu has been under road construction for a while, so I didn't notice, but a Vietnamese restaurant has been added to the Tabelog list. It's called HUONG QUE Phong Que, located next to the ramen and Chinese restaurant Izumi, and next to the izakaya Jun. This street, heading towards Don Quijote, has a Vietnamese food store Banh Mi Boja on the left, and a Vietnamese ingredients store on the right (name unreadable to me), and further down the Don Quijote intersection, there is a Vietnamese restaurant called Bep Co Mun. It feels like a street lined with flame trees. This restaurant also sells ingredients and serves Vietnamese cuisine. The exterior and interior are clean and well-maintained. However, I couldn't find the entrance because I could see the lights on through the glass. I opened the unadorned black door on the left, and there were ingredients right in front of me. So this was the entrance after all. The restaurant in the back has a stylish interior with wallpaper and bamboo lights. There are a total of 32 seats, including 4-person, 6-person, and 8-person tables, making it surprisingly spacious. The menu includes noodle dishes like pho familiar to Japanese, as well as frog and offal dishes, offering a variety of options. I thought about trying the offal dish, but for the first time, I went with noodles. I ordered the Bún Riêu Cua for 750 yen (tax included). Bún Riêu Cua seems to be a crab tomato soup with rice noodles. The served crab bun had a spotted orange clear soup with minced meat, fiétt (presumably solidified pig blood), coriander, and lettuce on top. There was also thick tofu hidden in the soup, along with finely chopped tomatoes, onions, and a small amount of bean sprouts. They seemed to have added more coriander as per my request. The soup had a light and pleasant taste, somewhat reminiscent of a pork or beef broth with a crab extract sauce poured in. The original soup had a delicious and subtly salty taste, with a mild flavor. The tomatoes were in small quantities, so there wasn't much acidity, but they added a refreshing touch to the flavor. The fiétt was too thin to have a rich flavor, and the minced meat had a good salty taste but a mild flavor. The bun was a round rice noodle, but the one used in this crab bun was thin. It was neither hard nor soft, just right. The coriander added a refreshing touch, making it a gentle and pleasant taste. Some people who prefer stronger flavors may find it a bit lacking, but I really enjoyed the taste. I was a bit surprised because the Japanese name indicated that there would be chunks of crab meat in the dish, but I couldn't see any within my view. Well, the crab extract must be working its magic in the background. According to web information, even with the same Bún Riêu Cua, the soup and ingredients can vary depending on the region or the restaurant, with some having a more pronounced tomato flavor or using tamarind for a stronger acidity. I would like to try Bún Riêu Cua at other restaurants if I come across it. Next time, I might try the offal porridge. It may not sound as appealing in Japanese, but it is quite enticing. No regular holidays. No parking available. Mambou is currently operating with shortened hours. Normally open from around 11-12:00 to around 23:00.