Subtitle Annotations

SubMiner annotates subtitle tokens in real time as they appear in the overlay. Four annotation layers work together to surface useful context while you watch: N+1 highlighting, character-name highlighting, frequency highlighting, and JLPT tagging.

All four are opt-in and configured under subtitleStyle, ankiConnect.knownWords, and ankiConnect.nPlusOne in your config. They apply independently — you can enable any combination.

Before any of those layers render, SubMiner strips annotation metadata from tokens that are usually just subtitle glue or annotation noise. Standalone particles, auxiliaries, adnominals, common explanatory endings like んです / のだ, merged trailing quote-particle forms like ...って, auxiliary-stem grammar tails like そうだ (MeCab POS3 助動詞語幹), repeated kana interjections, and similar non-lexical helper tokens remain hoverable in the subtitle text, but they render as plain tokens without known-word, N+1, frequency, JLPT, or name-match annotation styling.

N+1 Word Highlighting

N+1 highlighting identifies sentences where you know every word except one, making them ideal mining targets. When enabled, SubMiner builds a local cache of your known vocabulary from Anki and highlights tokens accordingly.

How it works:

1. SubMiner queries your Anki decks for existing Expression / Word field values.
2. The results are cached locally (known-words-cache.json) and refreshed on a configurable interval.
3. When a subtitle line appears, each token is checked against the cache.
4. If exactly one unknown word remains in the sentence, it is highlighted with nPlusOneColor (default: #c6a0f6).
5. Already-known tokens can optionally display in knownWordColor (default: #a6da95).

Key settings:

Option	Default	Description
ankiConnect.knownWords.highlightEnabled	false	Enable known-word cache lookups used by N+1 highlighting
ankiConnect.knownWords.refreshMinutes	1440	Minutes between Anki cache refreshes
ankiConnect.knownWords.decks	{}	Deck→fields map for known-word cache queries (legacy fallback: ankiConnect.deck)
ankiConnect.knownWords.matchMode	"headword"	"headword" (dictionary form) or "surface" (raw text)
ankiConnect.nPlusOne.minSentenceWords	3	Minimum tokens in a sentence for N+1 to trigger
ankiConnect.nPlusOne.nPlusOne	#c6a0f6	Color for the single unknown target word
ankiConnect.knownWords.color	#a6da95	Color for already-known tokens

TIP

Set refreshMinutes to 1440 (24 hours) for daily sync if your Anki collection is large.

Character-Name Highlighting

Character-name matches are built from the active merged SubMiner character dictionary, which auto-syncs character data from AniList for your recently-watched titles. Matching names are highlighted in subtitles and become available for hover-driven Yomitan character profiles — portraits, roles, voice actors, and biographical detail.

How it works:

1. Subtitles are tokenized, then candidate name tokens are matched against the character dictionary via Yomitan's scanning pipeline.
2. Matching tokens receive a dedicated style distinct from N+1 and frequency layers.
3. This layer can be independently toggled with subtitleStyle.nameMatchEnabled.

Key settings:

Option	Default	Description
subtitleStyle.nameMatchEnabled	true	Enable character-name token highlighting
subtitleStyle.nameMatchColor	#f5bde6	Color used for character-name matches

For full details on dictionary generation, name variant expansion, auto-sync lifecycle, and configuration, see the dedicated Character Dictionary page.

Frequency Highlighting

Frequency highlighting colors tokens based on how common they are, using dictionary frequency rank data. This helps you spot high-value vocabulary at a glance.

Modes:

• Single — all highlighted tokens share one color (singleColor).
• Banded — tokens are assigned to five color bands from most common to least common within the topX window.

SubMiner looks up each token's frequencyRank from term_meta_bank_*.json files. Only tokens with a positive rank at or below topX are highlighted.

Key settings:

Option	Default	Description
subtitleStyle.frequencyDictionary.enabled	false	Enable frequency highlighting
subtitleStyle.frequencyDictionary.topX	1000	Max frequency rank to highlight
subtitleStyle.frequencyDictionary.mode	"single"	"single" or "banded"
subtitleStyle.frequencyDictionary.matchMode	"headword"	"headword" or "surface"
subtitleStyle.frequencyDictionary.singleColor	—	Color for single mode
subtitleStyle.frequencyDictionary.bandedColors	—	Array of five hex colors for banded mode
subtitleStyle.frequencyDictionary.sourcePath	—	Custom path to frequency dictionary root

When sourcePath is omitted, SubMiner searches default install/runtime locations for frequency-dictionary directories automatically.

INFO

Frequency highlighting skips tokens that look like non-lexical noise (kana reduplication, short kana endings like っ), even when dictionary ranks exist.

INFO

Frequency, JLPT, and N+1 metadata are only shown for tokens that survive the subtitle-annotation noise filter. Standalone grammar tokens like は, です, and この are intentionally left unannotated even if a dictionary can assign them metadata.

JLPT Tagging

JLPT tagging adds colored underlines to tokens based on their JLPT level (N1–N5), giving you an at-a-glance sense of difficulty distribution in each subtitle line.

How it works:

SubMiner loads offline term_meta_bank_*.json files from vendor/yomitan-jlpt-vocab and matches each token's headword against the bank entries. Tokens with a recognized JLPT level receive a colored underline.

Default colors:

Level	Color	Preview
N1	#ed8796	Red
N2	#f5a97f	Peach
N3	#f9e2af	Yellow
N4	#a6e3a1	Green
N5	#8aadf4	Blue

All colors are customizable via the subtitleStyle.jlptColors object.

Key settings:

Option	Default	Description
subtitleStyle.enableJlpt	false	Enable JLPT underline styling
subtitleStyle.jlptColors.N1–N5	see above	Per-level underline colors

Runtime Toggles

All annotation layers can be toggled at runtime via the mpv command menu without restarting:

• ankiConnect.knownWords.highlightEnabled (On / Off)
• subtitleStyle.nameMatchEnabled (On / Off)
• subtitleStyle.enableJlpt (On / Off)
• subtitleStyle.frequencyDictionary.enabled (On / Off)

Toggles only apply to new subtitle lines after the change — the currently displayed line is not re-tokenized in place.

Rendering Priority

When multiple annotations apply to the same token, the visual priority is:

1. N+1 target (highest) — the single unknown word in an N+1 sentence
2. Character-name match — dictionary-driven character-name token styling
3. Known-word color — already-learned token tint
4. Frequency highlight — common-word coloring (not applied when N+1/character-name/known-word already matched)
5. JLPT underline — level-based underline (stacks with the above since it uses underline rather than text color)