Known elsewhere as Over Water Roller Coaster, the English signs at the park refer to it simply as "Coaster." This coaster has been built entirely over the lake, and is actually a pretty tall, very long coaster.
Again, the manufacturer is unknown, and again, an educated guess would be Meisho. This is very similar in appearance to Meisho's "Jet Coaster" style, in that it looks quite impressive but actually doesn't do a great deal.
This coaster is currently standing, but not operating. While it still features on the big map at the park's entrance, it has been removed from the smaller maps handed out to guests. This suggest that this ride is due for relocation/removal.