To be fair to the japs, most japs are peace loving today, and very passive. It is the right wings that are problems. I don't think eradication is a possible or rational goal. That will only push the japs to go nuclear, and the world to condemn China. Not a good ending. China should just focus on strengthening itself, and soon China will leave the japs to the dust. As long as China become the strongest and richest country in the world, the japs will recalculate their stance, and act accordingly. In the mean time, we just have to live with japs' provocations and they also have to live with Chinese counter provocations. Other than that, there is not much we can do to each other. Both countries are too interdependent now, at least for the next ten years or so.
Russia isn't a threat, it is an opportunity. China has settled the border dispute with Russia. Russia population is too small, and its territory is too big for them to bother China. In fact, they might be afraid of China. Both China and Russia are also facing the same enemy. China has never been so aligned with Russia interest in a long long time. China should work closely with Russia to deal with the US. The question is, how far should China accommodate the Russians? While both Russia and China facing the same enemy in the east, in the west it is a different matter. While China has tension with Europe, but it isn't that much of a big problem. There are plenty of area Europe and China can cooperate, and China has no interest to meddle in the European region. Russia will probably try to drag China into its problem with the EU, and I think China should just stay away from that. China should just focus on deepening the economic relationship with the Russians. Siberia could be a new source of food supply for China, to replace the one in the US that is a national security threat to China. Another thing that China need to prepare is the end of putin's era, and hopefully somebody like putin will come on top. But if it is a pro west president like the one in Ukraine, China could lose a potential ally, while not necessarily mean a new enemy. That would be a big loss for China.
India is also hardly a problem for China. I don't buy the hype surrounding India's so called rise. Nobody can fix that country's red tape and bureaucracy, believe me, I know. The so called demographic dividend is also just a pure BS, it is more like a ticking time bomb. Modi also made the problem worse by diving into religious conflict with the muslims. India has never been so divided like today. If India want to mess with China, China can easily support numerous separatist movements in India. China doesn't even need to dirty its hands. China can even help several bordering Indian states to achieve independent so they can act as buffering states. So far, China has refused to play dirty, unlike the Russians or the yanks. The day China is willing to dirty its hands, there will be a lot of pains for those who cross China.
For me, it is always the US that is the main rival. It is a huge country with huge resources and huge educated workforce. It also has a much further headstart than China, though China has caught up a lot. It is also extremely resilience, surviving recession after recession, depression after depression, lost wars after lost wars that emptied the treasury. Other countries might have collapsed several time over if they faced the same problem like the US. The US also a very open society with multiracial population that attract people all over the world to come and support them. The US is actually the modern version and a better version of Tang Dynasty. If possible, it is better to avoid this kind of enemy, but unfortunately, geography and China's own rise make it impossible. Like Tang dynasty, the US can only collapse from inside. Its openess and multiracial population are US greatest strengths, but also greatest weaknesses. There is not much China can do about that. Anyway, I predict biden will only serve one term, and the next president could be trump or somebody like him again. So China need to make good of this breathing period by keep increasing its national strength.