Sorry for the whataboutism but I think how each country is perceived when spending money on military is worth discussing.
Also, if Japan was Asia raping in WW2, China is China-raping now.
That being said; between the two, China today is more like Japan during WWII than Japan today is.
The PM and his party (the LDP) in coalition with the Komeito party have been trying to push that for years, without success. Mostly because the Japanese people don't seem to support it.
And to be fair, revising Article 9 and not going on a romp through the Middle East is also an option. I can see the rationale for doing so, besides right-wing nationalism on Japan's part.
That's definitely a possibility, however removing Article 9 is seen as a threat by China and might be a tactical error. Japan hasn't had any trouble building the defense force. If anything having Article 9 in place is plausible deniability for hostilities against China.