The literal translation of the word Tegaki is hand-drawn.
JAPANESE TATTOO MEANING #0
In tattooing, “Tegaki” refers to the technique of drawing directly on the skin with a marker, etc., instead of using a stencil to trace the design on the skin.
In traditional Japanese tattooing, designs and backgrounds are arranged to follow the curves of the body.
And considering Souchin Bori(full body suit) as a sence of unity in mind.
So Tegaki is necessarily more suitable for this purpose.