Logic Masters Deutschland e.V.

About the estimated difficulty: This puzzle should feel only slightly more tricky than the Tapa I posted a week ago and experienced solvers will very likely find this a lot closer to 2-stars. I am still initially posting it as a 3-star to indicate that this one has just a bit more to it.

Rules:

Nurikabe: Shade some cells so that the grid is divided into areas(islands) of unshaded cells. Each unshaded area contains exactly one clue, and that clue's value indicates the size of that island. Digits cannot repeat on an island. All shaded cells must be orthogonally connected with each other, but shaded cells cannot create a 2x2 block anywhere in the grid.
Japanese Sums: Place digits from 1-9 into every unshaded cell (including clued cells, if the clued cell is a letter, the digit to be placed is the corresponding cipher digit) such that no digit repeats in a row or column. Clues outside the grid are Japanese Sums clues, which indicate the sums of the connected unshaded blocks, in correct order. A ? stands for any digit 0-9, but for a double digit clue, the leading ? cannot be a zero. For each row or column, either all or no clues are provided.
Cipher: Clues are ciphered, where each unique letter stands for a different digit 0-9.

Puzzle Links: You can solve this puzzle in either Penpa+ or in CTC. Answer check is included for any correct gray shading and correct number placement, including the cryptic table.