The premise and conclusion are wrong. You want to compare the whole picture not just growth form your arbitrary start at the peak of a mountain (your false framing). And you can just adjust them to the same Y axis, no need for log. We care about the marginal dollar.
You’re doing a lot of work avoiding looking at the graph I posted in earnest. It’s the right graph, and again you can’t choose an outlier.
I strongly disagree it's the right graph. I wonder if you're just trolling at this point. Comparing growth rates of countries by looking at absolute values of dollars from countries of different sizes is madness.
I've given you 5 different framings at this point:
* Real GDP PPP % change over 30, 20, and 10 years to the most recent fully reported year.
* Share of high-income country GDP over last 20 years
* Per capita PPP GDP over 30 years, where it slid from parity with Germany in 2005 to about 80% of Germany's.
But they're all bad in favor of looking at a linear scale graph, where starting from a higher value in the green series obscures that the percentage of growth is low compared to most of the members of the set.
If you're determined to believe a specific conclusion, there's not much point in discussion.
Things growing at the same rate are parallel then.
I compared things on a 30 year, 20 year, and 10 year timescale. On each of them, Germany significantly outperformed Japan.