After his cryptic encounter with Aogi, Hyoma is determined to learn more about Botan. Haori is happy to explain, if only he'll be willing to listen...
It relates to his area of 
specialization, after all,
،هذا مُرتبط بمجال اختصاصه في النّهاية
Il a l’expertise qu’il faut
sur certains points.
Visto che la faccenda 
rientra decisamente nel suo campo,
É relacionado a especialidade dele.
Это как раз по его специальности,