Climbing legend Dai Koyamada and his 8C boulder without landing

With the first ascent of Boulder Mugen (8C) in Hinohara, Japan, Dai Koyamada showed that even at 46 he is still one of the best in his sport. Not only the inspection itself is impressive, but also the meticulousness of the preparation: Koyamada spent five days building the gigantic wooden landing platform.

The Japanese Dai Koyamada has numerous high-end boulders in his palmares, including The Wheel of Life (8C+, FA), Dreamtime (8C) or Nayuta (8C+, FA). He climbed his first 8C boulder 20 years ago. Recently, at the age of 46, he made the first ascent of Mugen (8C), a veritable symphony of finger holes.

“One thing is clear: this problem is great. One of the best problems in my life. And I could climb it. Those two facts make me happy."

Dai Koyamada

No ground, no landing

But before Dai Koyamada could even start designing the boulder, his manual skills were in demand. Because: The chalk stone he had in mind sits enthroned above a gorge of boulders.

«I can't complain about the beautiful wall. It has only one flaw: because there was no ground, there was no landing."

Dai Koyamada

Over a period of five days, he built a platform out of branches – a construction that more than lives up to the name platform and can even be admired from below.

  • Dai Koyamada built this huge landing platform under his youngest 8C Boulder Mugen
  • Dai Koyamada built this huge landing platform under his youngest 8C Boulder Mugen
  • Dai Koyamada built this huge landing platform under his youngest 8C Boulder Mugen

The name of his most recent 8C boulder means short-lived, explains Dai Koyamada. At the same time, mugen also means infinite in Japanese. "In other words, Mugen has a contradictory meaning."

Mugen: "At least 8C"

Regarding Mugen's assessment, he emphasizes that this finger hole climb will probably feel different depending on the size and thickness of the fingers. For him personally, it felt hard, says Dai Koyamada. "Since giving a rating is subjective, I can say that it felt like at least an 8C for me."

In Mugen (8C) a decisive factor: the finger size. Image: Dai Koyamada
In Mugen (8C) a decisive factor: the finger size. Image: Dai Koyamada

"I'm too old to discuss high-end boulder grades."

Dai Koyamada

Everything else should be decided by future repeaters among themselves. "I'm too old to discuss high-end boulder grades." It is much more important for the Japanese climbing pioneer anyway that Mugen is one of the best problems of his life and that he was able to climb it.

That might interest you

Do you like our climbing magazine? When we launched LACRUX, we decided not to introduce a payment barrier. It will stay that way, because we want to provide as many like-minded people with news from the climbing scene.

In order to be more independent of advertising revenue in the future and to provide you with even more and better content, we need your support.

Therefore: Help and support our magazine with a small contribution. Naturally you benefit multiple times. How? You will find out here.

+ + +

Credits: Cover picture Dai Koyamada

News

Ines Papert opens four spectacular new mixed climbing routes in Norway

She needs no introduction. When Ines Papert is out on the ice, you can expect spectacular lines and great stories. In the fjord valleys of Norway, the German ice climbing icon has completed four first ascents of impressive mixed routes in the last two months.

Solo in winter: Simon Gietl climbs “Phantom der Zinne” 7c+ (7a+ obl.)

On March 5th and 6th, South Tyrolean alpinist Simon Gietl completed a solo winter ascent of the challenging route "Phantom der Zinne" (7c+, 7a+ obl., 550 meters). The line on the north face of the Cima Grande was first climbed by Christoph Hainz and Kurt Astner in 1995 and is considered one of the most demanding and aesthetically pleasing routes on this striking wall.

8c+ onsight | Alex Mego's impressive tick list from France

A successful short trip to France came to an end for Alexander Megos from Erlangen, and his tick list is impressive. Shortly before the end, he onsighted the 8c+ route "Nadesjda".

“Ice climbing is a mental game” – mountain guide Jonathan Hilborn in an interview

Jonathan Hilborn is a certified mountain guide and active climber. Since January 2026, he has also held the role of General Manager Europe at Black Diamond Equipment. We spoke with him about his fascination with ice climbing and gathered some important tips for beginners as well as advanced climbers.

Ines Papert opens four spectacular new mixed climbing routes in Norway

She needs no introduction. When Ines Papert is out on the ice, you can expect spectacular lines and great stories. In the fjord valleys of Norway, the German ice climbing icon has completed four first ascents of impressive mixed routes in the last two months.

Solo in winter: Simon Gietl climbs “Phantom der Zinne” 7c+ (7a+ obl.)

On March 5th and 6th, South Tyrolean alpinist Simon Gietl completed a solo winter ascent of the challenging route "Phantom der Zinne" (7c+, 7a+ obl., 550 meters). The line on the north face of the Cima Grande was first climbed by Christoph Hainz and Kurt Astner in 1995 and is considered one of the most demanding and aesthetically pleasing routes on this striking wall.

8c+ onsight | Alex Mego's impressive tick list from France

A successful short trip to France came to an end for Alexander Megos from Erlangen, and his tick list is impressive. Shortly before the end, he onsighted the 8c+ route "Nadesjda".