A joint Japanese-Nepalese expedition made the first ascent of this 7000er on the Nepal-Tibetan border west of Himlung. Ratna Chuli is the highest peak in the Peri Himal NW of the Manaslu Himal and was not on any permitted list. However the Japanese in their quest to collect as many of the remaining virgin 7000m peaks, managed to persuade the Nepalese authorities to open it to foreigners. The team established two high camps on the long, but technically straightforward West Ridge and had to traverse a subsidary peak before being in position for a summit attempt, which was mde from the highcamp at 6550 metres/ 21500ft)