add support for japanese top->down

[cousquer]

Is your feature request related to a problem? Please describe.
dependencies: #30

Describe the solution you'd like
see #30 but top down also 😄

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[cousquer]

ref:
https://www.w3.org/International/articles/vertical-text/
https://24ways.org/2016/css-writing-modes/
https://developer.mozilla.org/en-US/docs/Web/CSS/writing-mode
perfect-japanese-typography
web-typography-in-japanese
https://www.chenhuijing.com/blog/chinese-web-typography/