This technique is the mirror image of Beast Breathing's Seventh: same anomaly, opposite handling. Direct inspection of the confirmed page (Vol. 11, p.59) shows the Japanese text spelling out 「獣の呼吸」then, in a separate hand-lettered column the corpus's automated OCR pass never captured as its own line, 「捌ノ型」— with full furigana はち over 捌 and かた over 型 — before the attack name 「爆裂猛進！！」. That's 型 (kata), not 牙: the same dojo-lineage word this style's Seventh technique also uses, in defiance of Inosuke's own self-taught vocabulary everywhere else. Two of Beast Breathing's nine techniques, and only two, briefly borrow the terminology of a trained swordsman. It reads like an authorial slip rather than a deliberate design — both instances cluster in early-to-mid volumes, and no later Fang repeats the pattern — but the slip is real and verifiable on both pages.
Where Seventh Form's VIZ translation preserved that anomaly ("SEVENTH FORM," matching the Japanese exactly), Eighth Form's VIZ translation erases it: the confirmed English page reads "EIGHTH FANG," folding the technique back into the numbering convention every other Fang uses, despite the Japanese in front of the translator plainly saying 型. Both choices are individually defensible — one preserves an easily-missed authorial quirk, the other keeps the English-language style name internally consistent for readers who were never going to notice a single stray kanji two volumes apart. Set side by side, though, they reveal that VIZ's own handling of this quirk isn't a fixed policy; it's a judgment call made fresh each time, with no visible cross-reference back to how the same anomaly was handled the first time it appeared.
The attack itself, 爆裂猛進 ("Explosive Rush"), doubles down on Inosuke's other favorite compound: 猛進 (moushin, "fierce charge") is the second half of his catchphrase 猪突猛進 (chototsu-moushin, "charging ahead like a wild boar"), the idiom he shouts constantly and the one phrase in this corpus most directly tied to his boar identity outside the Fang names themselves. Layering 爆裂 ("explosive burst") onto his own signature charge-word makes Eighth Form read less like a new invention and more like Inosuke's base instinct — running straight at the enemy — turned up as far as his two swords can take it.