Does Japan tax total capital gains or capital gains acquired while I have been a resident?

Let's say I bought a house for $100 while I was living outside of Japan and was a non-resident. That house went from $100 to $120 while I was a non-resident of Japan. Then I moved to Japan and became a resident and when I finally decided to sell the house after 10 years of being a Japanese resident, I sold it for $150. AFA Japanese taxes are concerned, will I be taxed on capital gains of $50 ($150-$100) or $30 ($150-$130).