What a fascinating bit of information.

Unfortunately, I'm practically certain that the search engine you have interrogated is returning some sort of error. The Canopus, as I am sure you are aware, was scuttled at Bataan in the Philippines in 1942 and about 500 of her crew were sent to fight on land, eventually being killed or captured at Corregidor. They were sent to Japanese prisoner of war camps from early May 1942; you can find some details of POW camps in the Philippines here.

Given the geography of the war, there was only limited contact between Germany and Japan, mostly via submarine, with a very few blockade runners also active. Perhaps the most successful and most interesting of their exploits was the voyage of the Tannenfels, which sailed from Bordeaux in February 1942 and reached Yokohama in May as part of a plan to establish a regular supply service for essential goods – the ship carried German machine tools and military hardware samples, and returned with a cargo of rubber, tungsten, titanium, zinc and other rare metals. (Other blockade runners of this period carried similar cargoes, plus coffee, walnut oil and, perhaps bizarrely, powdered egg.) Overall, there were 12 successful voyages up to the period when Corregidor fell, and these ships succeeded in bringing almost 220,000 tonnes of cargo to Germany, more than half of it rubber.

The Tannenfels left Japan in August 1942 and made port in France in November. One month later the ship was damaged by a British commando raid and efforts to establish regular communication with Japan were then pretty much abandoned. The reason I focus on this ship is that we know she did carry some POWs, but on investigation it appears that the prisoners she brought to France were all crewmen from various allied ships intercepted and sunk in the course of the voyage.

Subsequent to her adventures, we can say that, between the fall of Corregidor and the cessation of all surface communication between Germany and Japan in the spring of 1943, there are records of only four other completed voyages from Japanese-held to German-held ports; 11 other Axis ships were intercepted and captured or sunk. The successful blockade runners were:

Dresden, from Yokohama to Bordeaux, departing August 1942

Kulmerland, from Dairen in China to Bordeaux, departing August 1942

Pietro Orseolo, from Kobe to Bordeaux, departing January 1943

Orsono, from Kobe to Bordeaux, departing February 1943

Thus it is, theoretically, possible that a transfer of prisoners did take place via blockade runner. (Although later voyages involving submarines did take place, there would have been no room on such vessels for any but the most dramatically high profile of prisoners to be transferred.) However, because the main priority was cargo, it was certainly not usual for this sort of thing to occur and there would have needed to be a very specific and significant reason to undertake a transfer of this sort.

I note from your query that your relative was a carpenter's mate, third class, so it is not at all clear why he might have been singled out in such a way, and the suggestion that he ended up in an ordinary enlisted men's work camp, rather than a secure facility for high value prisoners such as Colditz, also makes it hard to see why such a transfer would have been attempted. If you are aware of a reason, please let us know! Otherwise, sadly, it appears much more likely that the database you are interrogating is returning an error, perhaps caused by it containing more than one person with the same name as your relative's.

Sources

Martin Brice, Axis Bockade Runners of World War II (1981). This book has been digitised and can be searched, but not read, at the Hathi Trust site, so you could run a name search for your relative to see if it is worth consulting the book itself.

Vincent O'Hara, The German Fleet at War, 1939-1945 (2013)

There is also a selection of links relating to the history of the Canopus online (last updated 2012) here.