Maybe the bowl-shaped J (J.ss10) could be designed a little narrower. Right now, the bowl-shaped J looks quite wide.
Additionally, the right side bearing of J.ss10 is smaller than the left side bearing of R, as shown in the image below.
Thirdly, there is only J.ss10 in the font, and the characters “ĴU+0134” and “IJU+0132” have no bowl-shaped style.