The Relationship Between Various Types of Teachers' Language and Comprehension exposes new research on the methods of successfully teaching Japanese as a second language. It breaks down the comprehension process into immediate comprehension, delayed memory of two to three weeks, and perceived comprehension. These different areas of comprehension were measured in response to speech adjustments, extralinguistic information such as contextualized pictures, and the use of the students' first language to explain grammar. Understanding the various phases of language comprehension so that teaching structure and style can be adjusted will assist teachers in reaching maximum efficiency in the classroom. The author specifically details the necessary methods of instruction that most thoroughly enhance every aspect of understanding for students.