Hello.

> Another option is to re-send the package with the commit you chose,
> along with a comment explaining why (e.g., exactly what you wrote
> above), and update it later when 17.x is released.
> 
> WDYT?

I think that re-send package along with comment explaining is good
choice. 

Although, I have found problems in my first patch. I solved them and
build version 16.3.

A build of my firth patch has two problems:
* It can't read info files.
* It can't read skk-tutorial.

For solve above, I needed to precisely follow installation manual of
ddskk.
https://github.com/skk-dev/ddskk/blob/ddskk-16.3_Kutomatsunai/READMEs/INSTALL


>>>> +(define emacs-ddskk  

>>> Wouldn't it be emacs-skk, since one need to (require 'skk)?

I researched to the history of ddskk's name. skk refer original skk.
Ddskk is extend of original skk , and original skk was developed other team.  It called ddskk for distiguish between it and original skk.
So I think that package name is `emacs-ddskk`. 
Actually debian and melpa use name of `ddskk`.

https://packages.debian.org/sid/utils/ddskk
https://melpa.org/#/ddskk


>>> is a version of @acronym{SKK, Simple Kana to Kanji} conversion
>>> program,

Thanks of teach `@acronym`. 
SKK is acronym of "Simple Kana to Kanji conversion program".

I resend new revision. 

Regards.