This is actually a rather complicated situation.
On the "yes" side: Japan certainly has the expertise, technology and equipment to construct nuclear weapons. They also have ready access to weapons-grade raw materials.
On the "no" side: Japan has a non-nuclear policy (to be clear here: that refers to weapons, not reactors for generating power) and construction of nuclear weapons may be forbidden by their constitution (whether or not small "tactical" nuclear weapons would be forbidden is a question of interpretation). So far as is known, they've never conducted any nuclear weapons testing... and the US would almost certainly know if they had.
Probably the best answer is: there's no particular reason to believe that Japan has nuclear weapons at this moment, but there's also no particular reason to believe they couldn't put one or more together on very short notice if they really wanted to.
the u.s. used non nuclear weapons and nuclear weapons against japan
No, they did not.
The US became the only nation with nuclear weapons .
no only blacks did no the US dropped 2 on Japan. Japan has never had nuclear weapons.
By 'us' I assume you mean the USA. Japan did not threaten anyone with nuclear weapons, it was only the USA who had them. The Japanese capitulated after the USA dropped atomic bombs on Hiroshima and Nagasaki.
I believe it is in turkey and the US was forced to remove them from turkey because they were threatend by Russian nuclear weapons in Cuba
US weren't effected by the Nuclear Weapons, They created it.
There has not been nuclear warfare. There have been two nuclear attacks. Nuclear warfare denotes the use of nuclear weapons by both or all opposing sides. The only use of nuclear weapons in warfare were the two bombings by the US of Hiroshima and Nagasaki, and it was the intent of the US to bring WW2 with Japan to a quicker conclusion.
The US chose NOT to deploy nuclear weapons. (The US did deploy nuclear weapons against Japan in WWII). The US chose NOT to invade North Vietnam. (The US did invade North Korea during the Korean War).
There have been many nuclear explosion in the US in places like, Nevada and New Mexico. In anger against the US no. Japan still remains the only country in the world to be bomb in anger with nuclear weapons.
1945, just in time to use 2 to end the war before the invasion of Japan was scheduled to start.
The US no longer makes nuclear weapons, it only refurbishes existing ones that are wearing out.