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Driving value in cross-border M&A deals
Insights from our life sciences survey
Why does cross-border M&A fail at the board level? In the fourth and final part of our cross-border M&A series, we detail why it’s rarely a lack of diligence, but a mismatch in focus. Learn how to transform boards from episodic approvers into strategic partners.
Why cross-border M&A breaks down
Boards, risk, and global control
How misplaced board focus impacts cross-border M&A value creation
Boards are deeply involved in cross-border M&A, yet many deals still underperform.
This is not because boards are disengaged. Our survey of M&A executives involved in cross-border transactions suggests that most boards are perceived as effective or very effective. The issue is where and how boards apply their attention across the deal life cycle.
Boards tend to concentrate oversight at visible milestones: signing, closing, and formal approvals. But those moments are rarely the ones where value is created or destroyed. Risk takes shape earlier, through strategy, diligence, and operating model definition. Value is realized—or lost—later, through sustained post-merger integration.
Cross-border M&A often breaks down above the deal team, when board oversight is misaligned with the ways deals actually create value.
Where should boards focus? The three drivers of cross-border M&A value
Three interdependent factors anchor effective cross-border deals (figure 1):
- Clear strategic rationale and value drivers that set up downstream activities for success
- Explicit articulation of the operating model, defining how the acquisition will create value greater than the sum of its parts
- Strong post-merger integration planning, with value-creation milestones tied to clear accountability
Boards are typically most active at approving transactions, yet least engaged where these three factors are defined, challenged, and stress-tested.
Figure 1: Board attention vs. value creation across the cross-border M&A life cycle
Boards tend to concentrate oversight at visible deal milestones such as signing and closing. However, survey insights and deal experience show that value is shaped earlier—through strategy, diligence, and operating model definition—and realized later through sustained post-merger integration.
Japanese vs. global perspectives: Bridging the board involvement gap in M&A
Our survey respondents describe a clear gap between the ways boards typically involve themselves in M&A deals and the ways board involvement could better support cross-border M&A outcomes.
While Japanese and non-Japanese executives emphasize different friction points, there is still a common theme: Boards should act less as episodic approvers and more as continuous strategic partners.
5 strategies to transform board governance in cross-border M&A
For M&A leaders, the challenge is not to redesign board structures unilaterally, but to engage boards differently across the deal life cycle—in ways that align oversight with the steps that actually shape and realize value.
Across our experience and survey insights, a consistent pattern emerges. Boards tend to be most active at formal approval moments, while the decisions that actually determine long-term value happen earlier—during strategy, diligence, and operating model design—and later, during sustained integration. M&A leaders can help close that gap by reframing how and when boards engage.
- First, boards should engage during the pre-signing phase—when value-shaping assumptions can still be challenged—and then remain involved through sign-to-close to test and refine those assumptions before execution begins.
- Second, boards should anchor their discussions around value moments, not just deal moments—explicitly shifting attention toward diligence quality, operating model design, decision-making architecture, and integration readiness.
- Third, M&A leaders can promote speed without sacrificing governance by introducing structure, not urgency. Clear delegation thresholds, approval timelines, and empowered committees preserve momentum while maintaining control.
- Fourth, boards’ involvement in integration oversight should continue beyond close, with structured checkpoints tied to value realization, culture, talent retention, and execution velocity—not just near-term financial results.
- Finally, M&A leaders can help elevate board capability over time by exposing directors to cross-border integration realities, encouraging ongoing education, and—where possible—advocating for greater diversity of experience and perspective.
Boards that evolve from milestone oversight to enterprise stewardship of transformation—aligned to long-term value creation rather than deal mechanics—are better positioned to drive successful global growth. M&A leaders who actively shape that engagement play a critical role in making that evolution possible.
Nemawashi meets deal speed
Redesigning decision-making for cross-border M&A
Beyond cultural bias: Aligning governance and decision rights in cross-border M&A
In cross-border M&A, slow decision-making is often explained as a cultural issue. In reality, it is more often the result of decision-making architecture that was never explicitly recalibrated in light of the transaction.
Leaders frequently point to post-close frustrations—opaque approvals, repeated escalations, and revisited decisions—as evidence of integration challenges or cultural mismatch. These dynamics are more accurately understood as the downstream effects of implicit assumptions about the ways decisions are made—both during the deal process and in the end-state organization.
The root causes of decision friction in cross-border M&A: Architecture vs. people
Executives often frame decision outcomes—whether delayed or overly rapid—as a people issue: insufficient empowerment, risk aversion, lack of urgency, or excessive individual discretion. That framing is incomplete.
In cross-border M&A—particularly involving Japanese and non-Japanese organizations—decision friction usually arises because:
- Decision rights and accountability for decisions are not distributed consistently;
- Escalation thresholds are unclear or subjective; or
- Leadership teams operate with different expectations about how decisions should move.
These gaps often emerge at deal inception, during strategy formulation, target evaluation, and diligence, and then persist into the end-state operating model if left unresolved. Teams improvise decisions during the transaction, normalize them during integration planning, and institutionalize them post-close.
That means decision speed is an outcome of architecture. When the architecture is implicit, even capable and well-intentioned leaders may default to caution, revalidation, and escalation, particularly in complex, cross-border contexts.
Figure 1: Implicit vs. designed decision-making architecture in cross-border M&A
Decision speed and quality are outcomes of architecture. In cross-border M&A, implicit decision systems amplify delay and rework, while explicitly designed ones align accountability and execution across borders.
Four key actions to improve cross-border M&A decision-making
For M&A leaders, the implication is clear: They must design decision-making explicitly across the full deal life cycle, not assume it.
At deal inception, leaders should:
- Map the most critical recurring decisions spanning deal strategy, diligence, and integration;
- Define which decisions require consensus, consultation, or ownership;
- Establish escalation triggers and resolution timelines; and
- Design how decision authority transitions from deal teams to integration and steady-state leadership.
These actions do not slow deals down. They reduce friction, protect leadership attention, and allow teams to focus on where they can actually create value.
Why post-merger integration fails before close
Three vital decisions
What’s really behind many cross-border M&A failures
Cross-border M&A failures are often described as integration problems. In reality, many of them are operating model failures that were locked in before the deal even closed. When integration teams encounter slow decisions, unclear authority, or persistent escalation loops, the root cause is usually not execution discipline or cultural resistance. It is more likely the absence of a clearly articulated operating model—one that defines how the combined organization will actually run, make decisions, and allocate control across geographies.
This friction is visible well before integration begins, reinforcing a central finding of this series: Many post-merger integration failures are rooted in pre-close ambiguity, not post-close execution missteps.
Three operating model decisions that matter before signing a cross-border M&A deal
Experienced deal leaders tend to converge on three operating model questions they must answer before integration planning begins. These are not PMI tactics; they are structural design choices.
What cross-border M&A leaders can do to avoid post-merger integration failures
For M&A leaders, the lesson is not to integrate more quickly, but to design earlier and more deliberately.
Operating model clarity is not an integration deliverable. It is a pre-signing leadership responsibility, refined through sign-to-close. It requires explicit trade-offs about control, autonomy, and decision-making that may feel uncomfortable—but which can be far less costly than resolving them post-close.
Cross-border M&A deals rarely lose value because integration teams fail. They lose it because deal teams ask people to integrate into an operating model that was never clearly defined.
Driving value in cross-border M&A
Insights from Japanese and global dealmakers
Cross-border M&A: A central but challenging pillar of global growth strategies
In Japan, as detailed by reports from Bloomberg and Reuters, outbound deal activity has accelerated sharply, supported by governance reform, increased private equity participation, and greater willingness to pursue complex carve-outs and take-private transactions. For Japanese organizations, particularly in life sciences, M&A has become a critical mechanism to access global markets, innovation, and talent, as articulated in Deloitte’s “Beyond borders” publication.
Yet despite these trends, along with experience and capital, executives continue to report uneven value realization related to cross-border M&A. They are seeing missed synergies, slower integration, and momentum loss after close. To understand why, we surveyed 126 global life sciences executives who have direct experience in cross-border M&A involving Japanese and non-Japanese organizations. We also interviewed a dozen more in the US, Europe, and Asia Pacific. The results point to a clear conclusion: Organizations broadly agree on what makes cross-border M&A difficult, but they diverge sharply on the reasons deals struggle and where in the process they are actually losing value.
At a surface level, executives across nationalities cite familiar challenges that align with decades of cross-border M&A research: regulatory complexity, communication barriers, and post-merger integration (PMI) risk. Figure 1 shows* that Japanese and non-Japanese respondents largely agree on which challenges make cross-border M&A difficult but differ in the relative emphasis they place on each of them.
In particular, non-Japanese respondents are more likely to focus on culture- and governance-related challenges, while Japanese respondents more frequently point to coordination and communication breakdowns. On its own, this difference reflects where the friction is most visible, but not how to interpret it.
Figure 1: Cross-border M&A challenges are widely recognized, but interpreted differently
Japanese and non-Japanese executives cite similar challenges but diverge on root causes. Non-Japanese respondents emphasize culture, communication, and capability gaps, while Japanese respondents more often experience governance and decision-making friction. Regulatory complexity is widely cited by both groups.
Non-Japanese respondents are significantly more likely than Japanese respondents to identify cultural integration and alignment as a primary PMI challenge. Non-Japanese respondents also raise cultural and communication barriers more frequently during negotiation and structuring, and place greater emphasis on cultural and organizational assessment during diligence (figure 2).
Survey responses help explain this gap. Non-Japanese executives repeatedly use the term “culture” as shorthand for decision rights, escalation paths, and risk tolerance—the ways work gets done in practice. Japanese executives, by contrast, often describe culture through the lens of process friction and communication breakdowns rather than root-cause operating constraints.
Figure 2: Cultural friction emerges across the deal life cycle, not just during integration
Cultural and organizational challenges surface at every stage of M&A. Non-Japanese respondents consistently flag culture earlier and more often, while Japanese more frequently experience its impact at closing and integration, suggesting culture is an execution constraint throughout the deal, not a post-close issue.
Non-Japanese respondents more frequently identify capability gaps—such as repeatable integration processes, governance infrastructure, and internal M&A muscle—as core challenges. Japanese respondents, meanwhile, more frequently cite late-stage communication breakdowns, particularly at closing (figure 3).
Experience further sharpens this contrast, but not in the ways often assumed. More experienced dealmakers are more likely to identify cultural differences as material drivers of cross-border difficulty. Less experienced participants report cultural and communication barriers at similar levels. This suggests that experience does not eliminate cultural friction, but rather reframes it from a surface coordination or unilateral execution challenge into a structural execution issue tied to decision rights, governance, and operating model design.
Figure 3: Deal experience reshapes how executives diagnose cross-border M&A challenges
Less experienced dealmakers focus on visible friction such as communication and coordination. More experienced leaders increasingly diagnose governance, decision-making, and capability gaps as the true constraints on execution. Experience shifts attention from symptoms to structural causes.
When respondents ranked post-merger challenges, culture, decision-making, and integration design consistently outranked technical or financial issues.
These findings are consistent with Deloitte’s experience advising complex cross-border transactions. In practice, value leakage rarely results from a single execution failure. Instead, it emerges when organizations defer critical early design choices about how the combined entity will be governed and run, leaving them implicit.
For senior executives, this is a critical insight. Financial and operational issues are easier to measure, which makes them easier to see. Value erosion, by contrast, usually starts elsewhere: decisions that drift, authority that is assumed rather than defined, and expectations that are never fully aligned (figure 4).
Figure 4: Value erosion in cross-border M&A is driven by execution, not mechanics
Post-merger value erosion is driven primarily by cultural alignment, decision-making, and integration execution rather than technical or financial issues. These challenges compound over time, delaying synergies and undermining momentum. Most value leakage reflects execution design, not deal strategy.
Endnotes:
*Throughout this article, figures reflect multi-select survey responses; percentages indicate frequency of selection rather than relative importance and are best interpreted directionally and comparatively across segments.
Catharina Lurken
