20 Sound Effects in Japanese Manga
(1) バッ (BA!): FWOOSH
A number of crows suddenly take flight in surprise
(2) スパン (SUPAN): SHPA
The samurai’s sword slices through a bandit.
(3) ビシィッ (BISHI-!): HWANG
Throwing a ball with power
(4) こっそり (KOSSORI): SNEAK SNEAK
The samurai secretly spying on the occupants
(5) チャキッ (CHAKI!): CHK
Quickly turning sword round in the hands to threaten someone
(6) ふあ~・・・ (FUA~…): YAWN
Yawning
(7) くらっ・・・ (KURA…): swoon・・・
Shows someone feeling dizzy or giddy
(8) ズズッ・・・ (ZUZU …): ZDDDD
Sniffling in fear
(9) ずずーっ (ZUZU―): SLUUURP
Sipping/slurping hot tea
(10) ぼ~・・・ (BO~…): *spaced out*
Absent-mindedly staring into space
(11) ポツポツ (POTSU POTSU): PLIP PLIP
A few drops of rain start to fall
(12) ザザ (ZA ZA): SHIF SHIF
Wind rustling through the trees
(13) ゲロゲロ (GERO GERO): CROAK CROAK
A croaking frog
(14) もぐもぐ (MOGU MOGU): MMG MMG
Vigorous chewing
(15) しぃ...ん (SHI-…N): *deathly silence*
Silence. No sign of life in a deserted village.
(16) サラサラ (SARA SARA): SWISH SWISH
The appearance of long, beautiful, glossy hair
(17) さくっ (SAKU!): SHKK
Something or someone being pierced or stabbed by something quite hard (in this case, an arrow to the heart.)
(18) うきうき (UKI UKI): YAHEY
An excited appearance – appearing to look forward to something
(19) ぎゅぅ (GYU!): GRAB
Hugging someone tightly
(20) ぼり (BORI): SKRITCH
Someone scratching his head
All taken from EXPRESSIONS BY SCENE at Japanese in Anime and Manga: http://www.anime-manga.jp/