I previously addressed this in a question here with the relevant passages:

The history of the Asian community in Nazi Germany is less well researched than the history of the Afro-German community. The only significant Asian community in Germany I have come across is the Chinese. In 1935 there were about 1.500 to 1.800 Chinese people in Germany, most of them living in Hamburg and Berlin having been sailors and settling down there. The Chinese in Germany were faced with several discriminatory measure, especially since many had ties to leftism and some had even served with the Republicans in Spain.

In 1938, the Reich Security Main Office (RSHA) under Reinhard Heydrich instituted the Zentralstelle für Chinese, a bureau with the specific task of preventing Chinese immigration to Germany and controlling those Chinese who lived there. In Berlin, the members of this RSHA bureau interned all the Chinese living there in Arbeitserziehungslager Langer Morgen. Arbeitserziehungslager were not Concentration Camps in that they were not run by the WVHA but instead by the local Gestapo. These camps were smaller but the living conditions there were not significantly less brutal than in the Concentration Camps.

In Hamburg, in May 1944 the Gestapo raided the part of town to which the Chinese living there had been forcibly confined in 1942. The so-called "Chinesenaktion" resulted in an additionally 130 Chinese being sent to Langer Morgen, where some of them such as Chan Ho Bau and Liang Wong were murdered.

Another and often forgotten example of racially motivated murder by the Nazi against East Asians is the treatment of East Asian and specifically Mongol Soviet soldiers. Together with Jewish POWs and Bolshevik Commissars, they belonged to the group of Soviet POWs who were singled out specifically to be killed by the Einsatzgruppen. The Mongols as the embodied of the "Asiatic Horde" in Nazi racial delusions were seen as especially dangerorus too. Where they weren't killed immediately, they often found themselves deported to the larger Concentration Camps such as Auschwitz to be killed there. The exact number is not known but it is important to include them in the racial victims of the Nazi regime.