Table: roman_chars
Columns: english
japanese
kana_spelling
revised_hepburn
kunrei_shiki
nihon_shiki

Question: how many revised hepburn when english is roman characters
SQL: SELECT "revised_hepburn" FROM roman_chars WHERE "english" = 'Roman characters'

Question: when chiji is revised hepburn what are all the english
SQL: SELECT "english" FROM roman_chars WHERE "revised_hepburn" = 'chiji'

Question: how many number of english when kunrei-shiki is otya
SQL: SELECT COUNT("english") FROM roman_chars WHERE "kunrei_shiki" = 'otya'

Question: how many kana spelling when english is mount fuji 
SQL: SELECT "kana_spelling" FROM roman_chars WHERE "english" = 'Mount Fuji'

Question: when english is tea how many nihon-shiki
SQL: SELECT "nihon_shiki" FROM roman_chars WHERE "english" = 'tea'