Opening Strategy
16.1 The First Few Discards
The opening phase of a hand (roughly the first 6 discards, or the first third of available turns) sets the trajectory for everything that follows. During this phase, all four players are developing their hands simultaneously, and information from discards is still limited. The primary goal in the opening is to maximize the potential of your hand by making tile-efficient discards that reduce shanten while preserving valuable hand-building paths.
16.2 Reading Your Starting Hand
When you receive your initial 13 tiles (14 for dealer), the first task is assessment. Quickly evaluate: What is my shanten? What partial groups do I have? Which suits are strongest? Do I have dora? Are there yakuhai pair candidates? Is there a clear hand plan (tanyao, pinfu, honitsu, etc.)?
Strong starting hands (3-shanten or better): Focus on pure tile efficiency. Discard isolated terminals and non-yakuhai honors first. Preserve your strongest suit connections and two-sided partials.
Average starting hands (4-5 shanten): Standard opening applies. Shed the least useful tiles while keeping all viable development paths open.
Weak starting hands (6+ shanten): Consider whether a standard hand is realistic. Very weak hands might pivot toward unusual structures (chiitoitsu if many pairs, kokushi if many yaochuuhai, or honitsu if tiles cluster in one suit with honors).
16.3 Standard Opening Discard Order
When no special hand plan is evident, the standard opening discard priority is approximately:
1. Isolated guest winds (winds that are neither your seat wind nor the round wind): These tiles have zero yaku potential and can only form triplets with exact matches. Discard first.
2. Isolated non-yakuhai honors: If you hold a single copy of a non-valuable wind, it's a prime discard candidate.
3. Isolated terminals (1s and 9s without adjacent tiles): Low connectivity, limited sequence potential.
4. Isolated edge tiles (2s and 8s without connections): These can form sequences more readily than terminals but are still weaker than central tiles.
5. Yakuhai: Typically held slightly longer than guest winds because if you draw a second copy, you have pair potential, and if you draw a third, you have a guaranteed yaku. However, if the hand is clearly heading toward tanyao or pinfu, even yakuhai may be discarded.
This discard order is a heuristic, not a rigid rule. Your specific hand composition always takes priority. If discarding an "isolated terminal" would break a kanchan partial (like holding 1m-3m and another isolated tile), keep the kanchan and discard the truly isolated tile instead.
16.4 Early Information and Opponent Reading
In the opening, you can also gather information from opponents' discards. Unusual early discards may signal hand plans: a player discarding 2m, 3m, and middle souzu tiles early may be developing a pinzu-heavy hand or honitsu. A player discarding all honor tiles early is likely pursuing tanyao or a speed-focused hand. While detailed hand reading (Module 20) applies more to mid and late game, awareness of opponents' opening discards trains good habits.
16.5 Balancing Efficiency and Value in the Opening
In the opening, pure tile efficiency is usually the top priority. At 4-6 shanten, the probability of reaching tenpai is your primary concern—you need to connect tiles into groups before you can worry about yaku or hand value. However, you should keep an eye on potential yaku paths. If two discards have similar ukeire but one preserves a possible pinfu structure while the other does not, prefer the one that preserves pinfu. Small value-aware adjustments in the opening compound over many hands into significant long-term gains.
QUIZ — Question 16.1
Your starting hand: 1m 4m 5m 7p 8p 2s 5s 6s 3z 3z 4z 6z 7z. Round wind: East. Your seat: South. What is your first discard?
Answer: B. 4z (North) is a guest wind—not your seat wind (South) and not the round wind (East). It has zero yaku potential and you hold only one. 3z (West) is also a guest wind, but you hold a pair (3z-3z), which has potential if you draw the third. 1m is a terminal but it's your only manzu presence near 4m-5m. 7z (chun) is a yakuhai—always worth holding briefly. Discard the single isolated guest wind first.
16.6 The "Guest Wind First" Principle — Japanese Instructional Consensus
The principle of discarding isolated guest winds first is so universally taught in Japanese mahjong instruction that it appears in virtually every beginner text. Fukuchi Makoto's (福地誠) introductory books devote specific chapters to opening discard order. Hirasawa Genki's (平澤元気) video series begins tile efficiency instruction with this exact principle. The reasoning is rigorous: a guest wind (non-round, non-seat wind) can only form a triplet, requiring two more exact copies from draws — a probability of roughly 3% per draw. An isolated suited tile can form sequences with adjacent tiles, giving it much higher connectivity.
However, there is a subtle refinement: if your hand is extremely honor-heavy (4+ honor tiles) and has poor suit connectivity, you might consider pursuing an unusual hand plan (honitsu with honors, or even kokushi if the honor distribution supports it) rather than mechanically discarding all honors. This situational override is discussed in advanced opening strategy sections of 『現代麻雀技術論』(Gendai Maajan Gijutsu-ron, "Modern Mahjong Technique Theory") by Nagai Takanori (長井隆典), a comprehensive strategy text used as a reference by many Japanese players.
16.7 Reading Opponents' Opening Discards
While the opening is primarily about developing your own hand, you should also begin gathering information from opponents' first discards. Key signals in the first 3-4 discards:
All honors first: The opponent is likely pursuing tanyao or a suited-hand plan. Their hand probably has strong suit connections.
Suited tiles discarded early: If an opponent discards 3m, 7m early, they probably are not building in manzu — their hand focuses on other suits.
No tiles from one suit: As early as turn 4-5, if an opponent has discarded tiles from two suits but nothing from the third, they may be accumulating that third suit (possible honitsu/chinitsu direction). Note this for future defense.
Tada Arata (多田あらた), an M-League commentator, regularly highlights these early-discard readings in broadcast commentary, demonstrating how professional players begin building opponent models from the very first discard.
Source notes: Opening discard heuristics are consistent across Japanese mahjong instructional sources. The "guest wind first, then terminals" order is standard advice in Japanese beginner-to-intermediate strategy guides.