Page 532 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar

458 te hajimete / ten (de)
(1) [Before, while, or just after eating sashimi]
3 LJ+(%?&460) Ckik%h-ic#J@-ic-C-.f.
(This is the first time I've had sashimi.)

ten (de) &(TI n.

point; respect; regard; aspect;
"a point of argument; a point of way; in terms of; -wise; in that;
as far as - is concerned
[REL. -men]
+Key Sentences

(B)

Dictionary in terms of ease of use.)