Like the first line: Ro - Tsu - Re | Re - Tsu meri - Ro. Play it and you'll get the picture. It explains why sometimes other notations for the same pitch are used. The up movement used kari notes and are notated as such; they sound strong. In line 3, I wrote it wrongly: It should be noted as the note between the (chi kari). When the movement goes down, like in line 3, the 5th note has the pitch of Tsu but needs to be played soft and be a meri note: so Re dai meri is written (wich has the same pitch as Tsu in this case). So in the downward movement the second note is always played meri and soft. Now you know!
This way of notating can be found in his version of Kumoijishi.