He later on became a peace activist and traveled to the U.S. To give speeches and have TV appearances and raised money for the surviving victim's treatments. Mr. Tanimoto is a more complex and complicated person in this novel and shows that he has ties to the U.S. He is acting upon them and this created suspicion to other Japanese people. He is spending so much time traveling to the U.S. that he misses out in the creation of a Japanese Peace movement in which he has no saying. Mr. Tanimoto has spend great time with survivors, yet due to his actions long after the bombing he appears not in good light to most Japanese people. His involvement and steady traveling to the U.S. made him not creditable to the Japanese government and raised suspicion there too.

Hiroshima, and how did people live with the devastation afterwards? We can say that many people had their own agenda, for the most parts as shown it was to help other people. While such devastating experiences...

On the contrary, people like Reverend Tanimoto, are quite different, even though their agenda seems the same, these people may follow a path which is not necessary the path of acknowledgment by others, and honorable as it needs to be in the Japanese culture. Based on their actions, people like Rev. Tanimoto, have honorable intensions, yet their way of showing does not confirm with the public belief in these actions.
Reference

Hersey, J. (ndi). Hiroshima. Retrieved May 04, 2010, from SparkNotes.com: http://www.sparknotes.com/lit/hiroshima/canalysis.html#Reverend-Mr.-Kiyoshi-Tanimoto

NAI. (ndi). Hiroshima: John Hersey. Retrieved May 04, 2010, from Cliff notes on Hiroshima: http://www.cliffsnotes.com/study_guide/literature/Hiroshima-John-Hersey-Biography-Later-Years.id-14,pageNum-9.html