SI-VIS: The Sound of Heroes

Anime
SI-VIS: The Sound of Heroes
2025/10/05
Speech time
3h 13min
Word count23,176
Unique words
3,892
Unique kanji
1,144
Avg. sentence10.4
Speech speed
327
Difficulty Average
Episodes14
Rating
58 %

SI-VIS is a co-ed music group, led by Yosuke, shaking up the global music scene with their unmatched vocals and performances. However, they are actually heroes in disguise, battling against mysterious forces threatening the world. They convert audience energy at live performances into combat power. Luckily, the battles appear to be ordinary concerts to the public, keeping their identity a secret. (Source: Crunchyroll)

Genres
Action
Drama
Music
Romance
Sci-Fi
Tags
Idol
Superhero
Urban
Super Power
Urban Fantasy
Memory Alteration
School

Japanese study overview

SI-VIS: The Sound of Heroes is a Japanese anime of 54,952 characters, with 3,892 unique words and 1,144 different kanji. Its difficulty rating on Jiten is average, 2.4 out of 5. The full vocabulary list ranks all 3,892 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.

Episode 1

Speech time
10min
Word count1,246
Unique words
514
Unique kanji
298
Avg. sentence8.8
Speech speed
307
Difficulty Average

Episode 2

Speech time
15min
Word count1,844
Unique words
707
Unique kanji
387
Avg. sentence11.3
Speech speed
334
Difficulty Average

Episode 3

Speech time
12min
Word count1,589
Unique words
646
Unique kanji
335
Avg. sentence10.0
Speech speed
349
Difficulty Average

Episode 4

Speech time
15min
Word count1,809
Unique words
723
Unique kanji
372
Avg. sentence11.5
Speech speed
342
Difficulty Easy

Episode 5

Speech time
14min
Word count1,714
Unique words
693
Unique kanji
339
Avg. sentence11.5
Speech speed
322
Difficulty Easy

Episode 6

Speech time
14min
Word count1,779
Unique words
743
Unique kanji
392
Avg. sentence11.3
Speech speed
354
Difficulty Average

Episode 7

Speech time
13min
Word count1,678
Unique words
675
Unique kanji
353
Avg. sentence9.4
Speech speed
325
Difficulty Average

Episode 8

Speech time
14min
Word count1,673
Unique words
695
Unique kanji
346
Avg. sentence9.6
Speech speed
313
Difficulty Average

Episode 9

Speech time
12min
Word count1,266
Unique words
526
Unique kanji
286
Avg. sentence7.5
Speech speed
271
Difficulty Average

Episode 10

Speech time
16min
Word count2,041
Unique words
765
Unique kanji
399
Avg. sentence12.2
Speech speed
347
Difficulty Average

Episode 11

Speech time
13min
Word count1,502
Unique words
575
Unique kanji
280
Avg. sentence9.5
Speech speed
308
Difficulty Average

Episode 12

Speech time
13min
Word count1,526
Unique words
596
Unique kanji
353
Avg. sentence9.7
Speech speed
295
Difficulty Average

Episode 13

Speech time
11min
Word count1,430
Unique words
592
Unique kanji
329
Avg. sentence11.1
Speech speed
343
Difficulty Average

Episode 14

Speech time
15min
Word count2,079
Unique words
729
Unique kanji
348
Avg. sentence12.1
Speech speed
353
Difficulty Average

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Vocabulary highlights

Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.

See the full vocabulary list (3,892 words) →