Denshi Jisho — Online Japanese dictionary

登場 とうじょう 1: entry (on stage); appearance (on screen);
2: entrance; introduction (into a market)
Common word, Noun, Suru verb 
登場 とうじょうかん launch impression (e.g. of new product in advertising); launch impact; presense
Noun 
登場人物 とうじょうじんぶつ the characters (in a play or novel)
Noun 

You can also

Look up kanji details for 登場.

Try a Yahoo Jisho search for 登場 .
Try a Goo Jisho search for 登場 .
Try a Google search for 登場 .