Vietnam is a large and fast-growing instant-noodle market with a distinctive rice-noodle subcategory that sets it apart from the wheat-dominated wider region. Vina Acecook (established 1993 as a joint venture between Japan's Acecook and Vietnam's Vifon) is the dominant manufacturer — its Hao Hao line is the single best-selling instant-noodle product in Vietnam, having sold over 30 billion packages through end-2021 with roughly 1.4 billion annual sales.
Vifon — Vietnam Food Industries Joint Stock Company (1963) — is the oldest domestic manufacturer and a specialist in rice-noodle Phở (beef and chicken) and Hủ Tiếu formats. Several smaller brands including Miliket and Asia Foods serve regional niches. Vietnamese instant flavours skew toward Hao Hao's signature Mì Tôm Chua Cay (Shrimp Sour & Spicy) along with sate onion, seafood, and Vietnamese-style beef pho.
Vietnam is one of the few national markets where instant pho (rice-noodle in beef or chicken broth with traditional spice aromatics) sits alongside wheat-noodle products as a first-class category — both Vifon Phở Bò and Vina Acecook's Oh! Ricey rice-noodle lines hold significant shelf presence. The rice-noodle format is also the primary Vietnamese instant-noodle export, distinctive enough to stand out in US, European, and Australian Asian-grocery aisles.