Is there islands called Japanese islands 16,000 years as ago? The answer is clearly NO. The current Japanese islands as we know were still linked to current Korea, China and Russia mainland. Therefore Jomon people staying there were not called Japanese, they were jomon jin. You yourself admitted Jomon was from Siberia, hence China or Russia, depending on which era.I'm not playing a word game with you. Japanese mean native people living in Japanese islands.
Jomon/Ainu were a hunter/gather race and had no mind to build a nation, so Yayoi/Yamato just started a nation of Japan. But they were Chinese or Korean and fake Japanese.
Please don't play a word game. Yamato were slant eyed Chinese or Korean. They are not native people living in Japanese islands Japanese.
Our ancestors chased mammoth all the way from Siberia to what is known as Japan today. Ice broke and hence islands were formed and Jomon becomes Ainu on the islands millennius later. Yamato people then arrived and marginised Ainu. Yamato started to call the islands Japan and themselves Japanese. Many centuries later, Ainu was finally admitted into Japanese people, but in blood, we are Siberian hence Russian. Yamoto were the original Japanese, we are Siberian or Russian. We should join force with Okinawa people of Ryuku to realise our true identity