The decision to launch the attack was made by a small group of high-ranking Japanese officials, including the Prime Minister and the Minister of War and Navy, and that some members of the military and government opposed the decision.
Some members of the Japanese military and government believed that a war with the United States would be a difficult and costly undertaking, and that attacking the United States would provoke a powerful response that Japan might not be able to withstand. Others believed that a peaceful resolution to the tensions between Japan and the United States could still be achieved through negotiation and diplomacy. However, the leaders who made the decision to attack believed that it was necessary in order to secure Japan's position in the Pacific and to prevent the United States from interfering with Japan's expansionist goals.
In summary, while the decision to attack Pearl Harbor was supported by a group of high-ranking officials and military leaders, it is likely that not all members of the Japanese military felt that the attack was necessary or the best course of action.