https://en.wikipedia.org/wiki/Teppanyaki

Simplifying and making it more general. I have encountered a wide range of dishes, both in and outside Japan. The history of the Wikipedia page, and the differing usage in and out of Japan is interesting.

@@ -17 +17 @@
-<gloss g_type="expl">Japanese cooking prepared on a hot steel plate (usu. placed in the middle of the table) such as steak and okonomiyaki</gloss>
+<gloss g_type="expl">dishes prepared on a hot steel plate (usu. placed in the middle of the table)</gloss>

even in restaurants お好み焼き aren't always prepared in the middle of the table.

I think it's worth mentionining things like okonomiyaki are included in the Japanese definition as I think in the 
US, a typical teppyanyaki restaurant will only cook steak + accompanying veggies on the teppan

@@ -15 +15,3 @@
-<gloss>teppanyaki (Japanese cooking prepared on a hot steel plate in the center of the table)</gloss>
+<field>&food;</field>
+<gloss>teppanyaki</gloss>
+<gloss g_type="expl">Japanese cooking prepared on a hot steel plate (usu. placed in the middle of the table) such as steak and okonomiyaki</gloss>

* https://books.google.com/ngrams/graph?content=teppanyaki,teppan-yaki

* https://www.lexico.com/en/definition/teppanyaki
* https://www.merriam-webster.com/dictionary/teppanyaki
* https://www.collinsdictionary.com/us/dictionary/english/teppan-yaki

Primarily unhyphenated.

@@ -15 +15 @@
-<gloss>teppan-yaki (Japanese cooking prepared on a hot steel plate in the center of the table)</gloss>
+<gloss>teppanyaki (Japanese cooking prepared on a hot steel plate in the center of the table)</gloss>

Koj too.