Mixture of romaji and hiragana in NHK "Meet and Speak"


In the NHK program "Meet and Speak", the phrases they use have a mixture of
hiragana and romaji. Not as in hiragana on one line, and romaji underneath,
but individual words being composed of the two, such as "すmimaせn".

![Example image](https://i.stack.imgur.com/z10ly.png)

What is the purpose of this mixture? Is is supposed to indicate pitch accent?
Alternatively, is romaji used for hiragana that the program has not yet
taught?




Your alternate hunch is correct I expect, as I've seen it
[elsewhere](http://www.tofugu.com/reviews/japanese-from-zero-1-progressive-
edition/) (referred to as 'progressive', there, but I'm not sure if that's a
universal term).




Your alternate hunch is correct I expect, as I've seen it
[elsewhere](http://www.tofugu.com/reviews/japanese-from-zero-1-progressive-
edition/) (referred to as 'progressive', there, but I'm not sure if that's a
universal term).

