The samurai statues found in Tagomi's office were custom built for the show. They act as symbols of strength, honor, and fair play. All of which represent who Tagomi is.
Miyamoto Musashi was a legendary Japanese warrior, thought to be born around 1584. He was born into a samurai family. As was traditional in samurai families, Musashi was taught swordsmanship at a young age. After the death of his mother, he was sent to live with his uncle, a monk who taught him the principles of Zen Buddhism.
Werner Heisenberg was a German physicist who won the Nobel Prize for Physics in 1932. He was most famously known for his uncertainty principle, which states that 'the more precisely the position is determined, the less precisely the momentum is known in this instant, and vice versa.' Heisenberg was also known for his controversial work during Hitler's regime, heading up Germany's research on nuclear fission. At the end of WW2 Heisenberg was captured by the Allies and imprisoned in England for 6 months. He was key in re-establishing science in Germany again after the war, and died in 1976.
In the world of "The Man in the High Castle," Nagasaki was not the target of an atomic bomb in 1945. Nagasaki would have remain a thriving shipping city with a military port.
The horns that sit behind Kido's desk belong to that of a water buffalo and are proudly decorated with the symbol of the Imperial Dragon. In the world of "The Man in the High Castle," Kido would have collected these on a campaign in China.