This one has been on my reading list for a while now. I think it was Kagari, who recommended it to me a while ago, when I was looking for a good horror manga.
6000, ch. 1
"6000" is a horror manga by Koike Nokuto.
A Japanese company built an underwater facility 6000 meters beneath the water surface. After a huge accident that kills the entire crew, the facility gets shut down and sealed. 3 years later, a Chinese company takes over everything and attempts to get the facility running again. The main character is Kadokura Kengo, who works for the company that got taken over by the Chinese, and is part of the new team that is supposed to prepare everything for the reopening. Hilarity ensures.
The first chapter was pretty decent so far. Kengo seems like a spineless company worker, who can't deal with pressure and authority figures. His new boss figured that out quickly and thinks Kengo might be perfect to get sent down there. The reader is still in the dark at this point, but quickly notices that the Chinese seem to know very well what went down on that facility three years ago. Intriguing.
It reminds me a bit of Dead Space. I hope I'm not wasting my time with this.