Scuffles broke out in the Upper House during the approval of the highly controversial military doctrine which allows Japan, for the first time since WW2, to conduct and locate military warfare/personnel outside her own borders.
But why now, why so much commotion among politicians and what will Japans' first move be?
https://www.rt.com/news/315685-japan-military-bills-pass/
It's important to note, that the overwhelming majority of Japanese do not want this new legislation to come in effect. They remember very well how an offensive military doctrine, can work disastrously counterproductive and how the effects of that will mostly affect the citizens of that nation. So it's save to say the politicians who voted for this legislation, do not have the voices nor interest of the Japanese people in mind.
Also important to note, that Japan never really took the same tone regarding their crimes in WW2, as Germany did
https://www.washingtonpost.com/news/worldviews/wp/2015/08/13/germany-won-respect-by-addressing-its-world-war-ii-crimes-japan-not-so-much/?noredirect=on&utm_term=.1bc75639a737
Last and certainly not least, we must notice that Japan is basically not cancelling the law, but merely trying to ''circumvent'' the obligations article 9 brings them, by simply ''reinterpreting'' the law.
https://www.japantimes.co.jp/opinion/2014/06/27/commentary/japan-commentary/reinterpreting-article-9-endangers-japans-rule-of-law/#.XE_Nwmko_Z5
China is now claiming the Spratly Islands. And though the reasons and justifications for China are debatable, this and Russia, are the core reasons as to why Japan is being politically pressured from outside to change their laws.
The United States already has the Philippines full cooperation (Read; Japanese occupation of the Philippines merely morphed to a U.S occupation), but for several years has also desperately been trying to persuade South Korea into joining the U.S/Philippine/South Korea triangle to counter China.
But South Korea has a lot of interest and positive developments with China, like the recently finalized and signed free trading agreement.
http://thediplomat.com/2015/06/its-official-china-south-korea-sign-free-trade-agreement/
The AIIB is another reason, this bank initiated by China will mostly counter the Japanese dominated ADB, and future interest will undoubtedly collide between the two as the AIIB is increasingly becoming more favorable due to it's milder policies.
http://www.aiibank.org/html/aboutus/AIIB/
http://www.reuters.com/article/2015/09/01/us-aiib-china-loans-idUSKCN0R14UB20150901
You've probably heard it before, but China is truly on the rise, and has done so without conducting aggressive military warfare nor are they party to any of the recent proxy wars against nations who are not benefiting them both politically and economically (Syria, Libya, Iraq etc).
Philippines is one of the candidates to be part of that war against China, but Manila seems rather reluctant to commit suicide. So in short, to counter China, the United States has to see Japan get involved, and they can not do so without taking a crucial and quite dangerous step and change their truly defensive military doctrine, into an offensive one.
https://www.youtube.com/watch?v=rHjlCmdyesY
At the time of writing, nothing significant has developed yet except for first of their kind military exercises.
https://thediplomat.com/2019/09/australia-japan-to-hold-first-joint-air-combat-exercise/
Recommended watch; Grave of the Fireflies: (Interesting Animation/Film based on actual events regarding the horrors Japanese citizens went through in WW2)
